| 查看: 1386 | 回复: 4 | ||||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | ||||
Parker一班木虫 (正式写手)
水牛生态学家
|
[交流]
大牛Chong-Min Wang最新高电压锂电力作（Chemistry of Materials，2015年10月29日） 已有3人参与
|
|||
|
题目：Phosphorus Enrichment as a New Composition in the Solid Electrolyte Interphase of High-Voltage Cathodes and Its Effects on Battery Cycling 作者：Pengfei Yang†, Jianming Zheng‡, Saravanan Kuppan§, Qiuyan Li‡, Dongping Lv‡, Jie Xiao‡, Guoying Chen§, Ji-Guang Zhang*‡, Chong-Min Wang*† † Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99352, United States ‡ Energy and Environmental Directorate, Pacific Northwest National Laboratory, 902 Battelle Boulevard, Richland, Washington 99352, United States § Energy Storage and Distributed Resources Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States 摘要：Immersion of a solid into liquid often leads to the modification of both the structure and chemistry of surface of the solid, which subsequently affects the chemical and physical properties of the system. For the case of the rechargeable lithium ion battery, consquence of such a surface modification is termed as solid electrolyte interphase (SEI) layer, which has been perceived to play a critical role in the stable operation of the batteries. However, the structure and chemical composition of the SEI layer and its spatial distribution and dependence on the battery operating conditions remain unclear. Using aberration-corrected scanning transmission electron microscopy, coupled with ultrahigh-sensitivity energy-dispersive X-ray spectroscopy, we probed the structure and chemistry of the SEI layer on several high-voltage cathodes. We show that layer-structured cathodes, when cycled at a high cut-off voltage, can form a Phosphorus-rich SEI layer on their surface, which is a direct evidence of Li-salt (LiPF6) decomposition. Our systematical investigations indicate that such a cathode/Li-salt side reaction shows strong dependence on the structure of the cathode materials, the operating voltage, and the temperature, indicating the feasibility of SEI engineering. These findings provide valuable insights on the interaction between the high-voltage cathode and the electrolyte, as well as the interface evolution upon battery cycling.  cm-2015-03510j_0008.gif |
回复此楼» 本帖附件资源列表
-
欢迎监督和反馈：小木虫仅提供交流平台，不对该内容负责。
本内容由用户自主发布，如果其内容涉及到知识产权问题，其责任在于用户本人，如对版权有异议，请联系邮箱：xiaomuchong@tal.com - 附件 1 : ChongminWang_ChemMater_2015.pdf
2015-10-29 05:02:29, 360.66 K
» 收录本帖的淘帖专辑推荐
 锂电资源共享 |
» 猜你喜欢
Renlab@monash全奖博士机会，最后三天！
已经有0人回复
-
今年面上没有消息，想来是没了，散个金攒攒人品，为明年祈福
已经有698人回复
-
分析化学论文润色/翻译怎么收费?
已经有223人回复
-
合肥工业大学854仪器技术综合专业课考研
已经有0人回复
-
27年电化学博士毕业，想找海外QS前50的高校读博后求推荐
已经有3人回复
-
27年电池/材料类博士申请
已经有2人回复
-
2027年博士申请或转博科研助理 求推荐
已经有1人回复
-
请问谁有2025最新影响因子Excel表？金币求助！
已经有23人回复
-
氯化钠与有机磺酸分离
已经有0人回复
5楼2016-04-24 21:04:30
Parker一班
木虫 (正式写手)
水牛生态学家
- 应助: 6 (幼儿园)
- 金币: 3641.7
- 散金: 27
- 红花: 57
- 帖子: 882
- 在线: 159.4小时
- 虫号: 2499414
- 注册: 2013-06-07
- 性别: MM
- 专业: 电化学
3楼2015-10-31 11:32:37
25