Opportunities for near zero volt storage of lithium ion batteries
推荐理由
零伏保护的里程碑文章，介绍了过放电损害，特别是对Cu集流体的损伤，同时提出了多种保护方案，最后通过电化学对负极进行预锂化，实现了较好的零伏保护效果。
| 文章简介 | |
|---|---|
| 期刊 | Energy & Environmental Science |
| 发表年份 | 2016 |
| DOI | 10.1039/c6ee00836d |
| 类型 | 研究性工作 |
| 领域 | 锂离子电池 |
| 引用量 | 34 |
| 推荐信息 | |
|---|---|
| 推荐人 | 王瀚晨 |
| 审核 | 文雄伟 |
| 推荐小组 | 电池小组 |
摘要
Abstract There are inherent safety risks associated with inactive lithium ion batteries leading to greater restrictions and regulations on shipping and inactive storage. Maintaining all cells of a lithium ion battery at near zero voltage with an applied fixed load is one promising approach which can lessen (and potentially eliminate) the risk of a lithium ion battery entering thermal runaway when in an inactive state. However, in a conventional lithium ion cell, a near zero cell voltage can be damaging if the anode electrochemical potential increases to greater than the potential where dissolution of the copper current collector occurs (i.e. ∼3.1 V vs. Li/Li+ at room temperature). Past approaches to yield lithium ion cells that are tolerant to a near zero volt state of charge will be reviewed and their anticipated tradeoffs discussed. Additionally, the present work introduces a novel method to prevent the anode potential from increasing to greater than ∼3.1 V vs. Li/Li+ during near zero volt storage by modifying the amount of reversible lithium in a conventional cell using a pre-lithiated anode. Specifically, LiCoO2/MCMB pouch cells fabricated with a pre-lithiated anode maintained 99% of their original capacity after three, 3 day and three, 7 day storage periods at near zero volts under fixed load. A LiCoO2/MCMB pouch cell fabricated with a pre-lithiated anode also maintained its original discharge performance after three, 3 day storage periods under fixed load at 45 °C. Thus, modifying the amount of reversible lithium in a cell with anode pre-lithiation is a promising concept to achieve lithium ion cells with high tolerance to near zero volt storage without modification to typical cell construction parameters or use of unconventional materials.
细分领域