Reviving rechargeable lithium metal batteries: enabling next-generation high-energy and high-power cells

Autor:	Yanbo Wang, Zhenning Yu, Guorong Chen, Chenguang Liu, Bor Z. Jang, Qing Fang, Xiqing Wang, Wei Xiong, David Neff, Aruna Zhamu
Rok vydání:	2012
Předmět:	High energy Materials science Renewable Energy Sustainability and the Environment Graphene Nanotechnology Metal anode Pollution Cathode law.invention Anode Nuclear Energy and Engineering law Environmental Chemistry Lithium metal Current density Separator (electricity)
Zdroj:	Energy Environ. Sci.. 5:5701-5707
ISSN:	1754-5706 1754-5692
Popis:	Herein reported is a fundamentally new strategy for reviving rechargeable lithium (Li) metal batteries and enabling the emergence of next-generation safe batteries featuring a graphene-supported Li metal anode, including the highly promising Li–sulfur, Li–air, and Li–graphene cells with exceptionally high energy or power densities. All the Li metal anode-based batteries suffer from a high propensity to form Li dendrites (tree-like structures) at the anode upon repeated discharges/charges. A dendrite could eventually penetrate through the separator to reach the cathode, causing internal short-circuiting and even explosion, the main reason for the battery industry to abandon rechargeable lithium metal batteries in the early 1990s. By implementing graphene sheets to increase the anode surface areas, one can significantly reduce the anode current density, thereby dramatically prolonging the dendrite initiation time and decreasing the growth rate of a dendrite, if ever initiated, possibly by a factor of up to 1010 and 105, respectively.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7ef999a0204bbd9e89b2625c70a7c604 https://doi.org/10.1039/c2ee02911a Zobrazit plný text záznamu