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Vol. 29 No. 24 June 27 2017 www.advmat.de Advanced Materials, Vol. 29, 2017, No. 24 www.advenergymat.de www.advmat.de Lithium-Sulfur Batteries ADMA_29_24_cover.

functionalized boron nitride nanosheets/graphene to decrease the charge transfer resistance and mitigate the shuttling problem

The new and advanced interlayer can effectively entrap the polysulfide (PS) and exhibit ultrahigh cycling abilities as compared

19/05/17 10:35 PM Advanced Materials has been bringing you the best in materials research for over twenty years.

Publishing every week, Advanced Materials now brings you even more of the latest results at the cutting edge of materials

de Zinc-Air Batteries Cu(In,Ga)Se2 solar cells sputtered from a single quaternary target without post-selenization yield

The enhanced efficiency is achieved by sequential post-treatments of Na and K, which improve the absorber quality due to

com 24/2017 www.small-journal.com Volume 13 No.

high-performance Zn-Air battery on an advanced bifunctional oxygen electrode where the nitrogen doped carbon nanotubes embedded

The encapsulated eco nanoparticles are introduced to enrich the nitrogen sites that possess a unique oxygen catalytic ability.

1 Vol. 29 No. 24 June Advanced Materials, Vol. 29, 2017, No Lithium-Sulfur Batteries ADMA_29_24_cover.indd 1 In article number , Weiwei Lei, Ying Chen, and co-workers design a thin and selective interlayer structure of functionalized boron nitride nanosheets/graphene to decrease the charge transfer resistance and mitigate the shuttling problem of lithium sulfur batteries. The new and advanced interlayer can effectively entrap the polysulfide (PS) and exhibit ultrahigh cycling abilities as compared to batteries without the interlayer. 19/05/17 10:35 PM Advanced Materials has been bringing you the best in materials research for over twenty years. With its increased ISI Impact actor of , Advanced Materials is one of the most influential journals in the field. Publishing every week, Advanced Materials now brings you even more of the latest results at the cutting edge of materials science. Zinc-Air Batteries Cu(In,Ga)Se2 solar cells sputtered from a single quaternary target without post-selenization yield efficiency of 14.1%, a record for using directly sputtering. The enhanced efficiency is achieved by sequential post-treatments of Na and K, which improve the absorber quality due to effective passivation. This is reported in article number by Chih-Huang Lai and co-workers. 24/ Volume 13 No. 24 June small 2017, Volume 13, Number 24 In article number , Zhao-Qing Liu, Tian-Yi Ma, and co-workers describe a high-performance Zn-Air battery on an advanced bifunctional oxygen electrode where the nitrogen doped carbon nanotubes embedded with e-co bimetal nanoparticles are employed as negative and positive electrode-catalyst for the Zn-Air battery. The encapsulated eco nanoparticles are introduced to enrich the nitrogen sites that possess a unique oxygen catalytic ability. Actually, assembling the e-co-c electrode into the Zn-Air battery achieves a boosted power density together with a robust charge-discharge cycle life. Near-Infrared Photodetectors Based on MoTe2/Graphene Heterostructure with High Responsivity and lexibility Q. Bao and co-workers SMALL_13_24_cover.indd 1 31/05/17 4:01 PM Small is the very best interdisciplinary forum for all experimental and theoretical aspects of fundamental and applied research at the micro and nano length scales. With an ISI impact actor of and publishing every week with papers online in advance of print, Small is your first-choice venue for topquality communications, detailed full papers, cutting-edge concepts, and in-depth reviews of all things micro and nano. Adv. Energy Mater. 2017, 7, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim wileyonlinelibrary.com (1 of 6)

Review Lithium-Ion Batteries Y. Deng,* C. Yang, K. Zou, X. Qin, Z. Zhao, G. Chen*...1601958 Recent Advances of Mn-Rich Lie 1-y Mn y PO 4 (0.5 y < 1.

0) materials are among the most promising cathode materials for next generation of high-energy-density lithium ion batteries.

well as some aspects for future exploration are outlined in this review. Progress REPORT Lithium-Oxygen Batteries P. Tan, M. Liu, Z. Shao,* M. Ni*.

2 Review Lithium-Ion Batteries Y. Deng,* C. Yang, K. Zou, X. Qin, Z. Zhao, G. Chen* Recent Advances of Mn-Rich Lie 1-y Mn y PO 4 (0.5 y < 1.0) Cathode Materials for High Energy Density Lithium Ion Batteries Mn-rich Lie 1-y Mn y PO 4 (0.5 y < 1.0) materials are among the most promising cathode materials for next generation of high-energy-density lithium ion batteries. The recent advances of the development of Lie 1-y Mn y PO 4, especially on the studies of synthesis strategies, structural features, delithiation/lithiation mechanisms, thermodynamic properties, as well as some aspects for future exploration are outlined in this review. Progress REPORT Lithium-Oxygen Batteries P. Tan, M. Liu, Z. Shao,* M. Ni* Recent Advances in Perovskite Oxides as Electrode Materials for Nonaqueous Lithium Oxygen Batteries Perovskite oxides as the electrode materials in nonaqueous lithium oxygen batteries are reviewed. uture research directions of perovskite oxides should focus on the understanding of electrochemical mechanisms during the oxygen reduction and evolution processes, the structure design from nanoparticles to hierarchical porous structures, and the composite incorporation with improved electrical conductivities, catalytic activities, and structural merits. COMMUNICATIONS Organic H. Li, D. He, P. Mao, Y. Wei, L. Ding,* J. Wang* Additive-ree Organic with Power Conversion Efficiency over 10% Organic photovoltaic devices with PThBDTP as donor and PC 71 BM as acceptor are fabricated, and a power conversion efficiency of over 10% is achieved without resorting to any additives and post treatments. Nanomaterials G. Han, S. R. Popuri, H.. Greer, L.. Llin, J.-W. G. Bos, W. Z. Zhou, D. J. Paul, H. Ménard, A. R. Knox, A. Montecucco, J. Siviter, E. A. Man, W.-g. Li, M. C. Paul, M. Gao, T. Sweet, R. reer,. Azough, H. Baig, T. K. Mallick, D. H. Gregory* Chlorine-Enabled Electron Doping in Solution-Synthesized SnSe Thermoelectric Nanomaterials An aqueous solution method is developed for the scalable synthesis of Cl-containing SnSe nanoparticles with tuneable particle size and Cl concentration. Hot pressing produces n-type Cl-doped SnSe nanostructured compacts with thermoelectric power factors optimized via control of Cl dopant concentration (2 of 6) WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Adv. Energy Mater. 2017, 7,

Controlled off-stoichiometry is induced in 5 V olivine LiCoPO 4 battery electrode material to overcome its insulating properties through the incorporation of lithium cobalt tripolyphosphate.

The electronic structure of the polyanionic compound, the Co 2+ /Co 3+ redox energy, and quantification of the inductive effect are provided. COMMUNICATION Lithium Batteries G. Cherkashinin,* S. U.

..1602321 Toward Enhanced Electronic and Ionic Conductivity in Olivine LiCoPO 4 Thin ilm Electrode Material for 5 V Lithium Batteries: Effect of LiCo 2 P 3 O 10 Impurity Phase An ion-selective

3 Controlled off-stoichiometry is induced in 5 V olivine LiCoPO 4 battery electrode material to overcome its insulating properties through the incorporation of lithium cobalt tripolyphosphate. An excellent electrochemical activity is achieved in this tailored carbon-free material. The electronic structure of the polyanionic compound, the Co 2+ /Co 3+ redox energy, and quantification of the inductive effect are provided. COMMUNICATION Lithium Batteries G. Cherkashinin,* S. U. Sharath, W. Jaegermann Toward Enhanced Electronic and Ionic Conductivity in Olivine LiCoPO 4 Thin ilm Electrode Material for 5 V Lithium Batteries: Effect of LiCo 2 P 3 O 10 Impurity Phase An ion-selective interlayer of graphene and boron nitride nanosheet is designed and inserted between separator and cathode to decrease the charge transfer resistance, mitigate the shuttling problem, and enhance the performance of lithium sulfur batteries. The hybrid interlayer is also expected to provide a new approach in other energy-storage systems that require a barrier to control the ion transportations. ull PaperS Lithium-Sulfur Batteries Y. an, Z. Yang, W. X. Hua, D. Liu, T. Tao, M. M. Rahman, W. W. Lei,* S. M. Huang, Y. Chen* unctionalized Boron Nitride Nanosheets/Graphene Interlayer for ast and Long-Life Lithium Sulfur Batteries Bamboo-like eco alloy encapsulated in nitrogen-doped carbon nanotubes exhibits superior catalytic oxygen reduction and oxygen evolution performance than that of noble metal benchmarks, which benefits from the nitrogen-rich and defect-rich catalyst surface. The all-solidstate zinc air batteries equipped by the synthesized materials show low charging/discharging overpotentials, long lifetime, and high flexibility, suitable for practical application. Sputtering from a single quaternary Cu(In,Ga)Se 2 (CIGS) target without postselenization yields 14.1% efficiency, surpassing all the reported efficiencies by using this simple approach. The enhanced efficiency is achieved by sequential post-treatments of Na and K, and the effects of the post-treatments on the quaternary-sputtered CIGS are discussed in detail. Zinc-Air Batteries C.-Y. Su, H. Cheng, W. Li, Z.-Q. Liu,* N. Li, Z. Hou,.-Q. Bai, H.-X. Zhang, T.-Y. Ma* Atomic Modulation of eco Nitrogen Carbon Bifunctional Oxygen Electrodes for Rechargeable and lexible All-Solid-State Zinc Air Battery C.-H. Hsu, W.-H. Ho, S.-Y. Wei, C.-H. Lai* Over 14% Efficiency of Directly Sputtered Cu(In,Ga)Se 2 Absorbers without Postselenization by Post-Treatment of Alkali Metals Adv. Energy Mater. 2017, 7, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim (3 of 6)

ull papers Wearable Electronics S. Li, J. Wang, W. Peng, L. Lin, Y. Zi, S. Wang, G. Zhang, Z. L. Wang*.

sustainable energy source for wearable electronics is demonstrated.

A pair of self-powered shoes with the TENG as outsoles is fabricated to realize different fitness functions without external inputs. Hydrogen Storage H. Wang, G. T. Wu,* H. J. Cao, C. Pistidda, A.-L.

..1602456 Near Ambient Condition Hydrogen Storage in a Synergized Tricomponent Hydride System Reversible hydrogen storage over hydrides of light elements (HLEs) at ambient condition is unattained

4 ull papers Wearable Electronics S. Li, J. Wang, W. Peng, L. Lin, Y. Zi, S. Wang, G. Zhang, Z. L. Wang* Sustainable Energy Source for Wearable Electronics Based on Multilayer Elastomeric Triboelectric Nanogenerators A multilayer elastomeric triboelectric nano generator (TENG) to be the sustainable energy source for wearable electronics is demonstrated. Structural design and material selection guarantee optimized electric output (volume charge density) from pressing, stretching, and folding operations. A pair of self-powered shoes with the TENG as outsoles is fabricated to realize different fitness functions without external inputs. Hydrogen Storage H. Wang, G. T. Wu,* H. J. Cao, C. Pistidda, A.-L. Chaudhary, S. Garroni, M. Dornheim, P. Chen* Near Ambient Condition Hydrogen Storage in a Synergized Tricomponent Hydride System Reversible hydrogen storage over hydrides of light elements (HLEs) at ambient condition is unattained albeit pursued actively for two decades. The compositing and complexing strategies, applied to three of the most investigated HLEs Mg(NH 2 ) 2, LiH, and LiBH 4 may provide the possibility of the implementation of reversible hydrogen storage under ambient condition. 2D Layered Materials H. Z. Tian, Z. W. Seh, K. Yan, Z. H. u, P. Tang, Y. Y. Lu, R.. Zhang, D. Legut, Y. Cui,* Q.. Zhang* Theoretical Investigation of 2D Layered Materials as Protective ilms for Lithium and Sodium Metal Anodes The practicability of the typical 2D layered materials (h-bn, graphene, silicene, germanene, stanene, phosphorene, SnS, and SnSe) as protecting films for lithium or sodium metal anodes from aspects of both the diffusion and mechanical properties is studied by first-principles calculations, and the study focuses on their relationship with the crystalline structures, defect feature, and metal s proximity effect. How to contact us: Editorial Office: Phone: (+49) /432 ax: (+49) advenergymat@wiley-vch.de Reprints: cherth@wiley-vch.de Copyright Permission: ax: (+49) rights@wiley-vch.de (4 of 6) WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Adv. Energy Mater. 2017, 7,

The relationship between the dielectric constant and the device performance is investigated in polymer solar cells.

More importantly, the increase in excited state polarizability upon blending is a key indicator of device performance and is responsible for efficient charge transfer. 4.8 PTB7:PC 71 BM 0.6 4.6 0.5 4.

Shewmon, E. D. Klump, C. Peng, S. Garakyaraghi, C. K. Lo, J. R. Reynolds,. N. Castellano,. So*.

5 The relationship between the dielectric constant and the device performance is investigated in polymer solar cells. The increase in the dielectric constant observed upon polymer fullerene blending correlates well with device performance, in contrast to the pristine polymer dielectric constant. More importantly, the increase in excited state polarizability upon blending is a key indicator of device performance and is responsible for efficient charge transfer. 4.8 PTB7:PC 71 BM Ground State Dielectric Constant Excited State Polarizability J SC 0.2 0% 3% 10% DIO Concentration ull PaperS Organic Photovoltaics I. Constantinou, X. Yi, N. T. Shewmon, E. D. Klump, C. Peng, S. Garakyaraghi, C. K. Lo, J. R. Reynolds,. N. Castellano,. So* Effect of Polymer ullerene Interaction on the Dielectric Properties of the Blend The dynamics of charge transfer from CH 3 NH 3 PbI 3 to charge-specific transport materials are revealed using time-resolved microwave conductivity measurements and a global kinetic model. Hence, the authors find that the transfer rates to C60, PCBM, EDOT-OMeTPA, and Spiro-OMeTAD are sufficient to outcompete other recombination pathways at excitation densities representative for AM1.5, while this is not the case for bis-pcbm, ICBA, and H101. Charge Transfer E. M. Hutter,* J.-J. Hofman, M. L. Petrus, M. Moes, R. D. Abellón, P. Docampo, T. J. Savenije* Charge Transfer from Methylammonium Lead Iodide Perovskite to Organic Transport Materials: Efficiencies, Transfer Rates, and Interfacial Recombination Ternary polymer solar cells based on PTB7- Th:PffBT4T-2OD:PC 71 BM are designed according to the complementary properties of PTB7-Th and PffBT4T-2OD. The highest efficiency of 10.72% for this ternary system is achieved with 15% PffBT4T-2OD. As for the working mechanism, this ternary system paves the way to investigate the morphology performance relationship. Moreover, the energy transfer is involved in ternary blend. Polymer. Zhao, Y. Li, Z. Wang, Y. Yang, Z. Wang, G. He, J. Zhang,* L. Jiang, T. Wang, Z. Wei,* W. Ma,* B. Li, A. Xia, Y. Li, C. Wang* Combining Energy Transfer and Optimized Morphology for Highly Efficient Ternary Polymer Charge selective extraction of photogenerated carriers by linearly increasing voltage is used to characterize planar and mesostructured perovskite solar cells. Inclusion of insulating layer into device structure prevents collection of unwanted carriers at corresponding electrode, provides valuable insight into charge transfer properties and pinpoints critical part of device responsible for trapping disorders. M. Petrović, T. Ye, C. Vijila,* S. Ramakrishna* Influence of Charge Transport and Defects on the Performance of Planar and Mesostructured Perovskite Solar Cells Adv. Energy Mater. 2017, 7, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim (5 of 6)

ull papers Skutterudites X. Meng, Z. Liu, B. Cui, D. Qin, H. Geng, W. Cai, L. u, J. He, Z. Ren,* J. Sui*.

the liquid phase compaction could simultaneously contribute to the energy filtering effect and strong phonon scattering.

Hydrogen Generation K. A. Walczak, G. Segev, D. M. Larson, J. W. Beeman,. A. Houle, I. D. Sharp*.

6 ull papers Skutterudites X. Meng, Z. Liu, B. Cui, D. Qin, H. Geng, W. Cai, L. u, J. He, Z. Ren,* J. Sui* Grain Boundary Engineering for Achieving High Thermoelectric Performance in n-type Skutterudites Low-angle grain boundaries with dense dislocation arrays in Yb-filled CoSb 3 fabricated by the liquid phase compaction could simultaneously contribute to the energy filtering effect and strong phonon scattering. Both high power factor and high average figure of merit ZT over a broad temperature range could be finally realized, comparable with all previous studies of advanced filled Skutterudites. Hydrogen Generation K. A. Walczak, G. Segev, D. M. Larson, J. W. Beeman,. A. Houle, I. D. Sharp* Hybrid Composite Coatings for Durable and Efficient Solar Hydrogen Generation under Diverse Operating Conditions A novel composite coating enables stable and efficient solar hydrogen generation under both basic and alkaline conditions and provides a versatile approach to scalably protect semiconductor light absorbers, integrate catalysts, and manage charge transport. This strategy is verified by demonstration of devices with unbiased solar-to-hydrogen conversion efficiencies exceeding 10% with pure gas product streams in both laboratory and outdoor testing environments. T. S. Sherkar, C. Momblona, L. Gil-Escrig, H. J. Bolink, L. J. A. Koster* Improving Perovskite : Insights rom a Validated Device Model A numerical model is developed and validated that describes the operation of perovskite solar cells and quantitatively explains the role of contacts, the charge transport layers, charge generation, drift and diffusion of carriers and recombination. By doing so, a unique set of material parameters and physical processes is identified that describes these solar cells. To increase their performance, some guidelines are issued (6 of 6) WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Adv. Energy Mater. 2017, 7,

Adv. Energy Mater. 2017, 7, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim wileyonlinelibrary.com (1 of 5)

Adv. Energy Mater. 2017, 7, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim wileyonlinelibrary.com (1 of 5) Volume 13 No. 31 August 18 2017 Vol. 29 No. 31 August 18 2017 www.advmat.de Solar Technologies go Hybrid Scientists of five Bavarian universities joined together in the state funded research network Solar