期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 160, 期 5, 页码 A3095-A3099出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.015305jes
关键词
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资金
- 'Element Strategy Initiative for Catalysts & Batteries (ESICB)' by Ministry of Education, Culture, Sports, Science and Technology (MEXT)
- Japan Society for the Promotion of Science (JSPS)
Aspiring for better cathodes beyond the LiFePO4 system, recently LiFeBO3 has been reported as a high-capacity (ca. 220 mAh/g) intercalation material involving the lowest reported volume change (ca. 2%) during its operation. It was obtained by conventional solid-state synthesis at 600 degrees C for 12 h and careful cathode optimization. Pursuing an alternate energy-savvy synthetic route, here we report a high-throughput aqueous synthesis forming one-step carbon-coated nanoscale (LiFeBO3)-B-II product, starting with the low-cost Fe-III precursor. Known as solution combustion synthesis, this two-step synthetic method can yield the (LiFeBO3)-B-II phase by a quick annealing at 400-600 degrees C for just <= 1 minute. The resulting borate cathode delivers near 1-electron discharge capacity in excess of 170 mAh/g with excellent reversibility, the first such achievement using any solution based synthesis. Various synthesis aspects, physical and electrochemical properties of combustion prepared (LiFeBO3)-B-II cathode have been presented, showcasing the versatility of this eco-efficient method to produce other metal borates and various polyanionic insertion materials for secondary batteries. (C) 2013 The Electrochemical Society.
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