Pseudocapacitors

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Volume 13 No. 17 May 3 2017 Vol. 29 No. 17 May 3 2017 www.advmat.

hydroxide film with a high efficiency in electrocatalytic water oxidation.

The turnover frequency of the film for the oxygen evolution reaches up to 8.7 s 1 at an overpotential of 329 mv.

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 Hydrogen Evolution In article number 1601671, Ruqiang Zou and co-workers introduce a novel facile bottom-up strategy for

co-doped graphene (CoP@BCN) nanotubes through pyrolysis and phosphidation-controlled methods.

evolution. www.small-journal.com 17/2017 Pseudocapacitors Hybrid Nanoscopy of Hybrid Nanomaterials N. Gálvez, C.

pseudocapacitor electrode, is a key for advanced batteries.

pseudocapacitor electrode increases drastically by surface state modification, which also accelerates Li-ion transport in

1 Volume 13 No. 17 May Vol. 29 No. 17 May Electrocatalysis A fast and simple stepwise electrodeposition is adopted to make an ultra-thin and reticular Nie hydroxide film with a high efficiency in electrocatalytic water oxidation. The resulting film is very thin and transparent, delivering promising applications in photovoltaic devices. The turnover frequency of the film for the oxygen evolution reaches up to 8.7 s 1 at an overpotential of 329 mv. This is reported by Rui Cao and coworkers in article number 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. Hydrogen Evolution In article number , Ruqiang Zou and co-workers introduce a novel facile bottom-up strategy for the synthesis of metal organic frameworks derived cobalt phosphide architecture encapsulated into boron and nitrogen co-doped graphene (CoP@BCN) nanotubes through pyrolysis and phosphidation-controlled methods. The new and advanced materials of CoP@BCN nanotubes exhibit excellent activity for all ph value electrochemical hydrogen evolution. 17/2017 Pseudocapacitors Hybrid Nanoscopy of Hybrid Nanomaterials N. Gálvez, C. lors, and co-workers A new class of battery electrode material using a rapid charge accumulation at the surface, a pseudocapacitor electrode, is a key for advanced batteries. In article number , Atsuo Yamada and co-workers demonstrate that the capacity of a titanium carbide (MXene) pseudocapacitor electrode increases drastically by surface state modification, which also accelerates Li-ion transport in the electrode. 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 5)

Review Batteries Y. Zhao, L. P. Wang, M. T. Sougrati, Z. eng, Y. Leconte, A. isher, M. Srinivasan, Z. Xu*.

sulfides nanocomposites, usually with complex composition and structures, have the ability to break through the potential of conventional battery materials.

COMMUNICATIONS Electrocatalysis W. Zhang, Y. Z. Wu, J. Qi, M. X. Chen, R. Cao*.

ultrathin Nie-hydroxide film is generated by stepwise electrodeposition with a significantly improved catalytic OER activity, as compared to Nie films obtained by using traditional methods.

2 Review Batteries Y. Zhao, L. P. Wang, M. T. Sougrati, Z. eng, Y. Leconte, A. isher, M. Srinivasan, Z. Xu* A Review on Design Strategies for Carbon Based Metal Oxides and Sulfides Nanocomposites for High Performance Li and Na Ion Battery Anodes Design rational of carbon-based metal oxides/metal sulfides nanocomposites, usually with complex composition and structures, have the ability to break through the potential of conventional battery materials. A comprehensive review summarizing evolution of these design mechanism is presented. inally, perspectives, key drawbacks, and future direction of these nanocomposites will be discussed. COMMUNICATIONS Electrocatalysis W. Zhang, Y. Z. Wu, J. Qi, M. X. Chen, R. Cao* A Thin Nie Hydroxide ilm ormed by Stepwise Electrodeposition Strategy with Significantly Improved Catalytic Water Oxidation Efficiency Nie film for oxygen evolution reaction (OER): An ultrathin Nie-hydroxide film is generated by stepwise electrodeposition with a significantly improved catalytic OER activity, as compared to Nie films obtained by using traditional methods. The turnover frequency of 8.7 s 1 at an overpotential of 329 mv is extraordinary and represents the highest value among heterogeneous OER catalysts. Hydrogen Evolution H. Tabassum, W. Guo, W. Meng, A. Mahmood, R. Zhao, Q. Wang, R. Zou* Metal Organic rameworks Derived Cobalt Phosphide Architecture Encapsulated into B/N Co-Doped Graphene Nanotubes for All ph Value Electrochemical Hydrogen Evolution Metal organic framework derived cobalt phosphide nanoparticles encapsulated B/N co-doped graphene nanotubes are fabricated through pyrolysis and phosphidation, which exhibit excellent electrocatalytic activity for hydrogen evolution reaction. Water Splitting B. C. Weng, Z. Xiao, W. Meng, C. R. Grice, T. Poudel, X. Deng, Y. Yan* Bandgap Engineering of Barium Bismuth Niobate Double Perovskite for Photoelectrochemical Water Oxidation Density-functional theory (DT) calculation reveals that the bandgap of barium bismuth niobate (Ba 2 BiNbO 6 ) double-perovskite oxide can be effectively narrowed if the oxide is made Bi-rich and Nb-poor. Material synthesis and characterization confirm the predictions from DT calculation. The results of this study suggest a new strategy for bandgap engineering of metal oxides toward active photoanodes for efficient water-splitting applications (2 of 5) 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Adv. Energy Mater. 2017, 7,

A hybrid energy harvesting-storage device consisting of an anodic MoO x pseudocapacitive electrode monolithically integrated on the rear Al electrode of an industrial screen-printed Si solar cell is

The Si solar cell can efficiently output power, and the MoO x pseudocapacitor can effectively mitigate the instability of solar energy by providing a buffer when the sunlight is insufficient, e.g., on cloudy days.

..1602325 Monolithic Integration of Anodic Molybdenum Oxide Pseudocapacitive Electrodes on Screen-Printed Silicon Solar Cells for Hybrid Energy Harvesting-Storage Systems Steric chloride termination

less diffusion limitation. The Li-ion hybrid capacitor with the MXene negative electrode achieves both high power and energy densities. ull PaperS Pseudocapacitors S. Kajiyama, L. Szabova, H.

3 A hybrid energy harvesting-storage device consisting of an anodic MoO x pseudocapacitive electrode monolithically integrated on the rear Al electrode of an industrial screen-printed Si solar cell is demonstrated. The Si solar cell can efficiently output power, and the MoO x pseudocapacitor can effectively mitigate the instability of solar energy by providing a buffer when the sunlight is insufficient, e.g., on cloudy days. Communication Energy Storage Z. Ouyang,* S. N. Lou,* D. Lau, J. Chen, S. Lim, P.-C. Hsiao, D.-W. Wang, R. Amal, Y. H. Ng, A. Lennon Monolithic Integration of Anodic Molybdenum Oxide Pseudocapacitive Electrodes on Screen-Printed Silicon Solar Cells for Hybrid Energy Harvesting-Storage Systems Steric chloride termination in MXene Ti 2 CT x opens the 2D interlayer space, which provides more accessible sites for intercalated Li ions, leading to the high electrochemical performance in Li-ion nonaqueous electrolyte with less diffusion limitation. The Li-ion hybrid capacitor with the MXene negative electrode achieves both high power and energy densities. ull PaperS Pseudocapacitors S. Kajiyama, L. Szabova, H. Iinuma, A. Sugahara, K. Gotoh, K. Sodeyama, Y. Tateyama, M. Okubo, A. Yamada* Enhanced Li-Ion Accessibility in MXene Titanium Carbide by Steric Chloride Termination The anode and cathode interfaces of CH 3 NH 3 PbI 3 perovskite solar cells are optimized simultaneously. The shallow lowest unoccupied molecular level of C 60 (CH 2 )(Ind) provides better energy level alignment and surface passivation. High performance opaque cell with a power conversion efficiency (PCE) of 18.1% (V oc : 1.13 V, : 0.8) and semitransparent cell with a PCE of 12.6% (AVT>20%) are achieved. The kinetic properties of phase transitions in Li-ion battery electrodes play a crucial role in battery performance but are relatively unexplored. Using density functional theory calculations it is shown that the structure of spinel Li 4+x Ti 5 O 12 stabilizes the phase interfaces resulting in a very high interface mobility responsible for the excellent rate performance of this material. Solar Cells Q. Xue, Y. Bai, M. Liu, R. Xia, Z. Hu, Z. Chen, X.-. Jiang,. Huang, S. H. Yang,* Y. Matsuo,* H.-L. Yip,* Y. Cao Dual Interfacial Modifications Enable High Performance Semitransparent Perovskite Solar Cells with Large Open Circuit Voltage and ill actor Li-Ion Batteries S. Ganapathy, A. Vasileiadis, J. R. Heringa, M. Wagemaker* The ine Line between a Two-Phase and Solid-Solution Phase Transformation and Highly Mobile Phase Interfaces in Spinel Li 4+x Ti 5 O 12 Adv. Energy Mater. 2017, 7, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim (3 of 5)

ull papers Water Splitting K. Qu, Y. Zheng, Y. Jiao, X. Zhang, S. Dai,* S.-Z. Qiao*.

evolution reaction (OER) electrocatalyst is designed by polydopamine chemistry to derive nitrogen,sulfur-codoping carbon nanotube (N,S-CNT), which exhibits the best HER and OER activity among the

..1602017 Highly Efficient and Stable Perovskite Solar Cells Based on Monolithically Grained CH 3 NH 3 PbI 3 ilm A new perovskite precursor and a two-step antisolvent processing method are utilized

The power conversion efficiency of the solar cells reaches 18.46% with much optimized stability, repeatability, and voltage responsibility. Lithium-Sulfur Batteries Z.-L. Xu, J.-Q. Huang, W. G.

4 ull papers Water Splitting K. Qu, Y. Zheng, Y. Jiao, X. Zhang, S. Dai,* S.-Z. Qiao* Polydopamine-Inspired, Dual Heteroatom-Doped Carbon Nanotubes for Highly Efficient Overall Water Splitting A metal-free bifunctional hydrogen evolution reaction (HER) and an oxygen evolution reaction (OER) electrocatalyst is designed by polydopamine chemistry to derive nitrogen,sulfur-codoping carbon nanotube (N,S-CNT), which exhibits the best HER and OER activity among the reported carbon electrocatalysts. The N,S-CNT loaded on the carbon cloth is directly used as anode and cathode for overall water splitting. Solar Cells C. ei, B. Li, R. Zhang, H. u, J. Tian,* G. Cao* Highly Efficient and Stable Perovskite Solar Cells Based on Monolithically Grained CH 3 NH 3 PbI 3 ilm A new perovskite precursor and a two-step antisolvent processing method are utilized to grow monolithically grained perovskite films. The as-prepared films have achieved enhanced light absorption, suppressed surface defect level, and accelerated charge separation and transport. The power conversion efficiency of the solar cells reaches 18.46% with much optimized stability, repeatability, and voltage responsibility. Lithium-Sulfur Batteries Z.-L. Xu, J.-Q. Huang, W. G. Chong, X. Qin, X. Wang, L. Zhou, J.-K. Kim* In Situ TEM Study of Volume Expansion in Porous Carbon Nanofiber/Sulfur Cathodes with Exceptional High-Rate Performance The correlation between volume expansion behavior and electrochemical performance of porous carbon/sulfur cathodes is established for the first time using in situ transmission electron microscope. It is revealed that the porous carbon nanofiber/sulfur composites containing micropores on carbon walls exhibit lower volume expansion and better structural durability than those with mesopores, resulting in largely different electrochemical performance and cyclic stability. 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 5) 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Adv. Energy Mater. 2017, 7,

An effective multifaceted strategy to increase active edge site concentration in Ni 0.33 Co 0.67 Se 2 solid solutions prepared by in situ selenization process is demonstrated.

Xia, H. Liang, J. Zhu, U. Schwingenschlögl, H. N. Alshareef*.

5 An effective multifaceted strategy to increase active edge site concentration in Ni 0.33 Co 0.67 Se 2 solid solutions prepared by in situ selenization process is demonstrated. The electrocatalyst gives a low overpotential of 65 mv at 10 mv cm 2, a Tafel slope of 35 mv dec 1, and an exchange current density of 184 µa cm 2 in acidic electrolyte. ull PaperS Electrocatalysts C. Xia, H. Liang, J. Zhu, U. Schwingenschlögl, H. N. Alshareef* Active Edge Sites Engineering in Nickel Cobalt Selenide Solid Solutions for Highly Efficient Hydrogen Evolution Detailed comparison of steady-state and ultrafast time-resolved experiments reveals that photogenerated carrier mobility in organic solar cells is significantly higher than that probed by spacecharge limited currents (SCLCs). The SCLC method is only valid for materials with a sufficiently low energetic disorder, where photogenerated carrier thermalization can be neglected. The over-simplified use of quasi-equilibrium mobility data in literature requires re-evaluation. Mobility OPV Photo-generated Quasi-equilibrated Time Organic Solar Cells A. Melianas,* V. Pranculis, Y. Xia, N. elekidis, O. Inganäs, V. Gulbinas, M. Kemerink* Photogenerated Carrier Mobility Significantly Exceeds Injected Carrier Mobility in Organic Solar Cells Temporal behavior of a selectively illuminated region in perovskite solar cells is tracked using photoluminescence (PL) and electroluminescence (EL) imaging. Although initially the EL (PL) intensity shows noticeable enhancement (reduction) in the illuminated region, it deteriorates (improves) over time relative to the non-illuminated surroundings. Combined with cross-sectional transmission electron microscopy, bias-induced perovskite/tio 2 interfacial electrical and/ or physical decoupling is demonstrated. Electroluminescence Imaging A. M. Soufiani,* Z. Hameiri, S. Meyer, S. Lim, M. J. Y. Tayebjee, J. S. Yun, A. Ho-Baillie, G. J. Conibeer, L. Spiccia, M. A. Green* Lessons Learnt from Spatially Resolved Electro- and Photoluminescence Imaging: Interfacial Delamination in CH 3 NH 3 PbI 3 Planar Perovskite Solar Cells upon Illumination Adv. Energy Mater. 2017, 7, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim (5 of 5)

Co-vacancy-rich Co 1 x S nanosheets anchored on rgo for high-efficiency oxygen evolution

Electronic Supplementary Material Co-vacancy-rich Co 1 x S nanosheets anchored on rgo for high-efficiency oxygen evolution Jiaqing Zhu 1, Zhiyu Ren 1 ( ), Shichao Du 1, Ying Xie 1, Jun Wu 1,2, Huiyuan