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Novel coating technology for performance enhancement of advanced lithium ion batteries for e- automotive markets

Development of novel coating technology of metal-oxide compounds on powder materials comprising advanced cathodes and implementation of the coated cathodes into the next generation li-ion batteries, , enabling endurance increase of the libs by >50%, compared to the pristine cathode material.

Practical operation of LIB is enabled via formation of electronically insulating layer on the anode to prevent/minimize solvent reduction taking place before intercalation of the lithium cation. This layer should provide good ionic conductivity enabling the migration of the Li+ across it, however with minimal electronic conductivity. Such a layer is referred to as Solid Electrolyte Interphase (SEI). It’s being considered that up to 4.2-4.3V (vs. Li) most of solvents maintain their stability with no apparent oxidation. However novel cathode materials enabling substantial increase of specific energy are recharged to higher voltages, reaching up to 5V where solvent oxidation takes place. Thus, next generation LIBs impose formation of SEI not only on the anode but on the cathode as well. Implementation of LIBs for E-automotive, impose operation at extreme conditions with extended battery performance and endurance thereby motivating further increase of system stability also with state-of-the-art LIBs. Current project refers to novel technology to form “Artificial SEI” (A-SEI) on advanced cathode materials. Tadiran Batteries (Israel) and ETV Energy (Israel), each one and both together, hold thorough knowhow and extensive, long term experience with LIB systems. Electrochemical group headed by Prof. Doron Aurbach, (Bar-Ilan University, Israel), is one of worldwide leading academies in the area of LIBs. The companies and the academy are engaged at TEPS consortium (Transportation Electric Power Solutions), to conduct generic R&D of advanced, next generation LIB systems for the automotive markets: HV-NMS cathode delivering 140mAh/gr at 4.7 to 4.0V is being developed by ETV and HE-NCM delivering 260mAh/gr within the voltage range of 4.5 to 3.0V is developed by Tadiran batteries. Both activities are supported by the Academic group of Prof. Aurbach. Clear Metal Inc. (Canada) (CMI) holds thorough knowhow of a novel technology related to Electrochemically Induced Deposition (EID) of Metal-Oxide forming advanced coating on flat substrates with 1 patent and 2 patent applications. It’s the scope of the current project to combine on one hand the skills and experience of Clear Metals Inc. and the experience of TEPS partners, on the other hand, to generate enabling technology and materials for the next generation LIBs. Same technology may be applied for endurance enhancement of state-of-the-art LIB systems, as well. The project challenge and SOW is related to (a) extension of the EID technology to form even and consistent Me-Ox coating on micro-size powder comprising the anode and cathode materials of LIB, to form EID A-SEI and (b) delivery of optimized electrode materials to be covered by A-SEI and (c) subsequent integration of the coat materials into the corresponding LIB systems with appropriate electrode design, electrolyte, separator, etc. The target is increasing the cycle-life and storage characteristics by >50% over same system with pristine electrode materials. A two (2) year program is projected. In the 1st year the key challenge and effort is the development of EID technology with appropriate coating of the cathode materials comprising micro-size, high surface area of electro conductive powder. Alumina coating will be conducted as the base-line for prelim evaluation of the A-SEI. In the 2nd year further optimization of the EID technology shall proceed with parallel optimization of the Me-Ox composition, thickness, consistency, etc. to form most effective A-SEI.
Acronym: 
NOVELCOATING
Project ID: 
9 905
Start date: 
01-09-2015
Project Duration: 
19months
Project costs: 
710 000.00€
Technological Area: 
Storage of electricity, batteries
Market Area: 
Batteries

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