首页|(166704)Corn-like Si derived from sepiolite as anode for advanced lithium-ion batteries
(166704)Corn-like Si derived from sepiolite as anode for advanced lithium-ion batteries
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NSTL
Elsevier
Low initial coulombic efciency (ICE) and poor long-term cycling performance are key issues of silicon (Si) anode for lithium-ion batteries (LIBs), due to the irreversible consumption of Li ion. Herein, Si with corn-like structure is synthesized by a simple and low cost magnesiothermic reduction method from pre-treated sepiolite ore. The ICE of corn-like Si reaches 75.1 % and can be increased to almost 100 % by a simple surface prelithiated engineering, meanwhile the charge capacity remains 788 mA h·g-1 (0.56 mAh·cm-2) after 500 cycles at 1 A·g-1(0.71 mA·cm-2). Further SEM observation reveals that the prelithiated Si electrode keeps the original corn-like structure during cycling, confrming that available-Si from natural clay is applicable for the production of LIBs.
SepioliteInitial coulombic efciencyCorn-like Si anodePrelithiationLithium ion batteries
Nantao Chen、Yiyang Lv、Youlan Zou
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School of Materials Science and Engineering, Xiangtan University, Xiangtan, Hunan, 411105, P.R. China
NSTL
Elsevier
