Abstract
Development of advanced high energy density lithium ion batteries is important for promoting electromobility. Making electric vehicles attractive and competitive compared to conventional automobiles depends on the availability of reliable, safe, high power, and highly energetic batteries whose components are abundant and cost effective. Nickel rich Li[NixCoyMn1-x-y]O2 layered cathode materials (x > 0.5) are of interest because they can provide very high specific capacity without pushing charging potentials to levels that oxidize the electrolyte solutions. However, these cathode materials suffer from stability problems. We discovered that doping these materials with tungsten (1 mol%) remarkably increases their stability due to a partial layered to cubic (rock salt) phase transition. We demonstrate herein highly stable Li ion battery prototypes consisting of tungsten-stabilized Ni rich cathode materials (x > 0.9) with specific capacities >220 mA h g-1. This development can increase the energy density of Li ion batteries more than 30% above the state of the art without compromising durability.
Original language | English |
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Pages (from-to) | 1271-1279 |
Number of pages | 9 |
Journal | Energy and Environmental Science |
Volume | 11 |
Issue number | 5 |
DOIs | |
State | Published - May 2018 |
Bibliographical note
Publisher Copyright:© 2018 The Royal Society of Chemistry.
Funding
This work was mainly supported by the Global Frontier R&D Program (2013M3A6B1078875) on Center for Hybrid Interface Materials (HIM) funded by the Ministry of Science, the Human Resources Development program (No. 20154010200840) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade. Q. Z. and P. K. gratefully acknowledge supports from the ‘‘China Scholarship Council’’ (CSC) and ‘‘Bundesministerium füur Bildung und Forschung’’ (BMBF). Q. Z and P. K. also acknowledge the North-German Supercomputing Alliance (HLRN) for providing HPC resources. High resolution X-ray diffractions experiments at PLS-II were supported by MSIP. Partial support was also obtained by the Israel Committee for High Education and the Israel Prime Minister Office in the framework of the INREP project.
Funders | Funder number |
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Center for Hybrid Interface Materials | |
Global Frontier R&D Program | 2013M3A6B1078875 |
HIM | |
Ministry of Science | 20154010200840 |
Ministry of Trade | |
Bundesministerium für Bildung und Forschung | |
Ministry of Science, ICT and Future Planning | |
China Scholarship Council | |
Korea Institute of Energy Technology Evaluation and Planning |