期刊
ACS NANO
卷 11, 期 6, 页码 6362-6369出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.7b02731
关键词
Li metal anodes; graphene; carbon nanotubes; full battery; Li dendrites
类别
资金
- National Council for Scientific and Technological Development (CNPq), Ministry of Science, Technology and Innovation, Brazil
- AFOSR MURI program [FA9550-12-1-0035]
- AFOSR [FA9550-14-1-0111]
The drive for significant advancement in battery capacity and energy density inspired a revisit to the use of Li metal anodes. We report the use of a seamless graphene-carbon nanotube (GCNT) electrode to reversibly store Li metal with complete dendrite formation suppression. The GCNT-Li capacity of 3351 mAh g(GCNT-Li)(-1) approaches that of bare Li metal (3861 mAh g(Li)(-1)), indicating the low contributing mass of GCNT, while yielding a practical areal capacity up to 4 mAh cm(-2) and cycle stability. A full battery based on GCNT-Li/sulfurized carbon (SC) is demonstrated with high energy density (752 Wh kg(-1) total electrodes, where total electrodes = GCNT-Li + SC + binder), high areal capacity (2 mAh cm(-2)), and cyclability (80% retention at >500 cycles) and is free of Li polysulfides and dendrites that would cause severe capacity fade.
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