Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 11, Issue 5, Pages 1271-1279Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ee00227d
Keywords
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Funding
- Global Frontier R&D Program on Center for Hybrid Interface Materials (HIM) - Ministry of Science [2013M3A6B1078875]
- Human Resources Development program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant - Korea government Ministry of Trade [20154010200840]
- China Scholarship Council (CSC)
- Bundesministerium fuur Bildung und Forschung (BMBF)
- MSIP
- Israel Committee for High Education
- Israel Prime Minister Office
- Korea Evaluation Institute of Industrial Technology (KEIT) [20154010200840] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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]O-2 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.
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