CIC energigune All Rights Reserved
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1 2014 CIC energigune All Rights Reserved
2 1.
3 RESEARCH LINES CIC Research Areas: EES Research Lines System oriented Cross oriented Other areas of knowledge
4 Li-based Batteries: Status and Trend
5 Li-ion Research Line Background Increase of energy density (350 Wh/kg): Increase of cell voltage Increase of capacity Reduction of cost (< 200 kwh): use of cheap TM-based compounds replacement of Cu current collectors Binder-free electrodes Reduced environmental impact Cycleability (5000 cycles) Develop and improve high energy density materials based on intercalation reactions: High voltage materials High capacity materials (>2e - /TM) Overcome limitations of conversion reactions: Reduce voltage hysteresis through a materials approach Develop positive and negative electrodes with improved performance and cost Use of optimized electrolyte formulation with ionic carriers High energy efficiency Reduce degradation and increase lifetime Search for an optimized electrolyte formulation for Li-ion batteries through the study of electrode/electrolyte interfaces. Elucidate reaction mechanisms through the development of novel in-situ analytical tools
6 Post lithium-ion batteries To satisfy the industrial needs developing of new batteries is required: High energy density batteries: Metal-oxygen/air batteries Low cost batteries : Sodium-ion batteries. Other types of batteries that have attracted much attention: Magnesium-ion Organic electrode batteries H.Zhou, Energy & Environ. Sci. ( 2013) DOI: /c3ee90024j
7 Li-air Batteries Starting with the knowledge acquired from Li-ion batteries, to obtain batteries with higher energy density, up to 10 fold increase in gravimetric energy density. Li-Air BATTERIES Discharge voltage of 2.7 V Li (s) Li + + e (anode) Li + + 1/2O 2 + e 1/2Li 2 O 2 (cathode) Li + + 1/4O 2 + e 1/2Li 2 O (cathode) Theoretically energy density: >11500 Wh/kg based on Li only Question: practically, can it really compete with Li-ion and what are main issues?
8 Li-air Research Line Background The goal of this work is to develop a working prototype for a rechargeable Li-air battery with the following figures of merit : Cycle life 5000 cycles at 80-90% DoD Specific energy density 4000 Wh/kg Operating temperature range -25 to 60 C The time frame: medium term range (i.e years) Strategy Development of a reliable cell baseline Synthesis, characterization and electrochemical testing of alternative anode materials Synthesis, characterization and electrochemical testing of nanostructured cathode materials: Carbonaceous cathode supports (nanocarbons, metal-nanocarbon hybrids, etc.) Electrocatalysts for the oxygen evolution reaction (OER) and for the oxygen reduction reaction (ORR). (Task developed at the University of the Basque Country UPV/EHU)
9 EES (Batteries & Supercaps) Project with industry Title: Advanced materials and new technologies for Li-S batteries Goal: To develop a working prototype Li-S battery with the following target : - specific energy density > 500 Wh/kg, - driving autonomy >400km, - cost < 250 $/kwh. Objectives: Research of anodic materials focused on avoiding dendrite formation in the Li negative electrode, or replacing it by an alloy with higher chemical stability towards sulfides. Study of cathodic materials based on redox polymers with disulfide (S-S) bonds to eliminate capacity fading associated with solubility of polysulfide specii. Substitution of liquid electrolytes with polymer electrolytes in order to minimize the dissolution of polysulfides. Simulation techniques to complement the interpretation of the experimental studies, to investigate atomic-scale features and to predict the improvements of materials. Results: New Project Collaborators: Agreement with industry to be drawn CIC Proprietary & Confidential Information
10 Potential impact of the innovation: Li-S batteries are of great interest because: High energy density (3 times compared to Li-ion batteries) High capacity High rate capability Low cost Safety Theoretical energy density comparison (Tudron F.B. et al. Sion Power Corporation, 2004). Specific energies for rechargeable batteries (Bruce P.G et al. Nature Materials, 11,19 (2012)).
11 Background Anode: Li metal Electrolyte: Organic electrolyte Cathode: Porous Carbon + S Electrochemical reaction: S Li 8Li 2 S Eº = 2.15V The solid sulfur is reduced to form polysulfides. The high-voltage plateau ( V) is related to the reduction of elemental sulfur to the higher order lithium polysulfides (Li 2 S n, 8 n 4). Further reduction of high-order polysulfides (Li 2 S n, n 4) to lower-order (Li 2 S n, n<4) occurs at the low-voltage plateau (<2.1V).
12 MATERIALS 1. Sample preparation i. Charged state ii. Discharged state iii.polymer electrolyte iv. Formulation of liquid electrolytes 2. Structural characterization 3. Physicochemical characterization i. Spectroscopyproperties ii. Discharged state Tasks detail PROTOTYPING Modelling and simulation (5) SYSTEM 4. Compatibility studies and electrochemical performance i. Analysis of materials interaction before cycling ii. Study of the influence of the binder. iii.test the electrochemical performace. TESTING & SCALE UP 6. Postmortem Analysis 7. Scale-up of new built cells
13 EES (Batteries & Supercaps) ETORTEK Jan 10 Dec 12 ETORTEK Jan 11 Dec 13 Title: Goal: Objectives: Development of Viable Na-ion Battery Technology Development of a low cost high energy sodium ion battery for stationary storage applications with target values of: - cycle life 2000 cycles at 85% capacity retention, - specific energy density >130 KWh/kg (current Li technology), To produce a complete battery based on the intercalation of Na ions at room and close to room temperature. Composed of: -high voltage cathode (>3.5V vs. Na) -medium voltage anode (<1.5V) which should show high stability. Electrolyte formulations will be developed in parallel for the chosen electrode materials. Once we have both candidates, we will perform nanostructuration of the active materials on both electrodes for improved electrochemical performance. Results: Patent: 1 requested Papers: 3published + 2 submitted Review:Top Ten most-read (May 12) Conferences: 2 presentations Collaborators: CIC Proprietary & Confidential Information
14 Research Line Background First review on Na-ion batteries Cited >180 times In the Top 10 most-read articles in 2013 Recent advances in: Na-ion batteries Aqueous Non-aqueous Na-air batteries
15 Schematic of a typical Na-ion cell Conductive additive Binder Na 1M NaPF 2/3 MO 2 Na 2/3-x MO 2 + xna + + xe- 6 Na 2 Ti 3 O 7 + 2Na + + 2e - + Na 4 Ti 3 O 7 EC:DMC Ideal Battery High cell voltage and specific capacity High energy density Safety Low-cost Long cycle life. Modeling Calculations Energy Density : 210 Whkg -1 With: Cathode capacity of 200 mahg -1 Anode : 500 mahg -1 Average Cell Potential: 3.3V
16 Current research of Na-ion electrode materials Na(Fe,Mn)O 2 *NaFePO 4 *Na 3 V 2 O 2x (PO 4 ) 2 F 3-2x *Na x (Fe,Mn,Ni,Mg)O 2 Na 2 Ti 3 O 7 *(Na,H,Li) 2 Ti 3 O 7 *Na(Al x Ti 1-x )O 2 *PB K x Fe 2 (CN) 6 H 2 O Sn,Sb 600 P 1500 Modified from P. Segunttuvan, Chem. Mater. ( 2011)
17 EES (Batteries & Supercaps) Internal Project Title: Goal: Objectives: Solid Electrolytes for Na & Li batteries To develop more secure and reliable solid electrolytes with high ionic conductivity, through the replacement of currently used liquid organic solvents. Polymer Electrolytes -Preparation hybrid nanoparticles grafted either with polymer stands or/and plasticizer (such as ionic liquid, organic compounds with high dielectric constant, etc.). Ceramic Electrolytes -Use of ceramic ionic conductors to increase the safety and chemical and electrochemical stability of the systems with the advantage that ceramic materials can be obtained with a wide variety of stoichiometries, crystal structures and microstructures which lead to a controlled range of electrochemical properties with applicability in these devices. Results: Papers: 1 under preparation Conferences: 1 presenations Collaborators: CIC Proprietary & Confidential Information
18 Two types Inorganic ceramic electrolyte -Sulfides, phosphates, oxides. glasses Organic polymer electrolyte -Solid polymer (PEO) -Polymer gel Advantages Safer and more reliable than conventional solvent based liquid electrolytes Potentially being able to simplify battery design and manufacturing process Major issues Low conductivity, especially at low temperatures Poor mechanical strength Compatibility with electrode materials Stability of the interface Fergus, Journal of Power Sources 195 (2010)
19 1. Research Line Background Research Line Goals: Goal: To develop more secure and reliable solid electrolytes with high ionic conductivity (>10-5 S/cm at room temperature with a transport number t + 1) through the replacement of currently used liquid organic solvents. Objectives: Ceramic Electrolytes Wide variety of stoichiometries, crystal structures and microstructures for high diffusion. Increase the safety and chemical and electrochemical stability of the systems. Polymer Electrolytes Preparation of hybrid nanoparticles grafted either with polymer stands or/and plasticizer (such as ionic liquid, organic compounds with high dielectric constant, etc.).
20 Global Aims Minimisation of Grain Boundary At Imperial
21 Objectives: Polymer Electrolytes To develop more secure and reliable solid electrolytes with high ionic conductivity through the replacement of currently used liquid organic solvents. Good ionic conductivities at r. t. > Scm -1 Limitation of secondary reactions Nanohybrid polymer electrolytes Good mechanical properties ~ 5 MPa Good electrochemical stability ~ 1-4 V
22 Nanohybrid polymer electrolytes Nanoparticles grafted with the anions of Na + salts
23 Nanohybrids electrolytes New polymer electrolytes with nanosio 2 grafted with PEG and/or anion.
24 EES (Batteries & Supercaps) ETORTEK Jan 12 Dec 15 Project with industry Title: Goal: Objectives: Development of Capacitors To optimise the synthesis of carbon materials and transitional metals oxide/nitrides to obtain high energy and power of supercapacitors in both gravimetric and volumetric terms. Synthesis of novel electrode materials for electrochemical capacitor application with easier production and less costly than the best electrochemical capacitor electrode materials known to date. -Optimised synthesis of nanoporous carbons from different precursors. -Exploration of pseudocapacitive materials based on the oxides/nitrides of transitional metals. Results: Industrial collaboration Papers: 0 Conference presentations: 6 Collaborators: CIC Proprietary & Confidential Information
25 1. Research Line Background - Materials & Systems Electrochemical Capacitors or Supercapacitors EDLCs (Carbon materials) Pseudocapacitors (Oxides and conducting polymers) Non-Faradaic (no charge transfer) Pseudocapacitance Charge transfer through surface faradaic reactions CIC works on: Activated carbons from renewable inexpensive biomass precursors Soft-template ordered mesoporous carbons for high-rate supercapacitors CIC works on: Transitional metal oxides (e.g., MoO 3 ) Transitional metals nitrides/oxinitrides (VNx)
26 EES (Batteries & Supercaps) MAT4BAT Project with industry Title: Goal: Batteries & Supercaps Post-mortem Analysis The aim of this work generate extensive knowledge on failure roots and a better understanding of critical ageing mechanisms occurring in different electrochemical devices (batteries, supercapacitors ) in order to propose behavioral and predictive models for battery performance and lifetime under various practical operating conditions (charge, discharge, rest time). Strong interactions with industrial partners and international technological centers are expected. Objectives: A complete literature survey about ageing mechanisms of Li-ion batteries and supercapacitors Cell opening. Defining protocols for opening pouch-cells and cylindrical cells (safe state of charge, controlled atmosphere ) and samples collection Chemical characterization: ICP, surface characterization (XPS, EDS) Physical characterization: electron microscopy Electrochemical characterization: potentiostatic tests, galvanostatic tests and impedance spectroscopy Results: Industrial collaborations Collaborators: CIC Proprietary & Confidential Information
27 Voltage (V) Capacity (mah/g) Why Prototype? Basic Research Best Results / RL Output Prototyping Advanced Engineering Feasibility Studies Other Intermediate Steps / Management Final Production Industry Various Research Lines at CIC Lithium Ion Batteries Sodium Ion Batteries Li S Batteries Supercapacitors Solid Electrolytes Some results possess challenge for future advancement mah/g Charge Capacity 1 50 Discharge Capacity Cycle Number Capacity (mah/g)
28 Strategy for R&D on batteries XRD, SEM In situ, ex situ Morphology In situ AFM, SEM TEM Structural analysis Interfacial properties PITT, EIS, CV, chronopotenciometry EIS, BET Electroanalyticalbehavi our of electrode compounds Correlation Surface chemistry FTIR, XPS, EDAX, EQCM In situ y ex situ CV, in situ EIS, DTA, FTIR Solution studies: Electrochemical window Thermal stability Redox processes Optimization of electrode materials Testing in practical cells: coin cell and AA battery
29 2013 CIC energigune All Rights Reserved THANK YOU FOR YOUR ATTENTION
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