期刊
SOLID STATE IONICS
卷 262, 期 -, 页码 39-42出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2013.09.014
关键词
Li-Si alloy; Si thin flakes; Li pre-doping; Irreversible capacity; Cycleability; Vinylene carbonate
To compensate the large irreversible capacity (Q(irr)), lithium was pre-doped to Si thin flakes (Si Leaf Powder (R) (Si-LP), thickness: 100 nm) for different times, and its effects on the charge/discharge characteristics such as reversible capacity, cycleability, and rate-capability were investigated in detail. The charge/discharge test results showed that a large initial Q(irr) of ca. 2300 mAh g(-1) for the Si-LP can be completely compensated by Li pre-doping, and a high capacity (>2500 mAh g(-1)) was obtained for pre-doped Si-LPs. The pre-doping did not cause any harmful effects on cycleability as long as lithium was uniformly pre-doped. The addition of vinylene carbonate to the electrolyte solution in the pre-doping and in the test cell greatly improved the cycleability, and a high discharge capacity of ca. 2300 mAh g(-1), was kept after 40 cycles. (C) 2013 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据