| 引用本文: | 高鹏,朱永明,张翠芬,李宁.金属锂电极表面预处理液的优化选择[J].哈尔滨工业大学学报,2011,43(2):70.DOI:10.11918/j.issn.0367-6234.2011.02.014 |
| GAO Peng,ZHU Yong-ming,ZHANG Cui-fen,LI Ning.The optimum option for surface pretreatment of lithium electrode[J].Journal of Harbin Institute of Technology,2011,43(2):70.DOI:10.11918/j.issn.0367-6234.2011.02.014 |
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| 摘要: |
| 为了提高二次金属锂电极的性能,采用1,3-二氧戊环、1,4-二氧六环和四氢呋喃作为预处理液,对锂电极进行浸泡处理,而后与LiCoO2组装成扣式电池,并测试其性能.结果表明:用1,3-二氧戊环和1,4-二氧六环处理可使锂电极循环性能及放电性能得到较大提高,在四氢呋喃中处理却使电极性能下降.相比而言,1,4-二氧六环处理后电池性能更好,但其50次循环后放电特性不佳.通过配方改进研究发现,采用1,4-二氧六环(质量分数70%)、电解液(质量分数30%)、LiPF6饱和溶液作预处理液可使锂电极性能大幅提高,不但循环寿命增加约20%,第80次循环的放电平台也增加了近200 mV. |
| 关键词: 锂二次电池 锂电极 表面预处理 1,3-二氧戊环 1,4-二氧六环 四氢呋喃 |
| DOI：10.11918/j.issn.0367-6234.2011.02.014 |
| 分类号:TM912 |
| 基金项目:威海市科技攻关计划资助项目(2008083) |
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| The optimum option for surface pretreatment of lithium electrode |
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GAO Peng1, ZHU Yong-ming1, ZHANG Cui-fen2, LI Ning1,2
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1.Department of Applied Chemistry,Harbin Institute of Technology at Weihai,264209 Weihai,Shandong,China;2.Department of Applied Chemistry,Harbin Institute of Technology,150001 Harbin,China)
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| Abstract: |
| The lithium metal electrode was pretreated to be soaked in 1,3-dioxolane,1,4-dioxane and tetrahydrofuran separately,then Li metal cell was assembled with LiCoO2cathode.It is found that the cycling and discharge performance are improved greatly when lithium electrode was pretreated with 1,3-dioxolane and 1,4-dioxane.But lithium electrode properties treated with tetrahydrofuran can’t be improved.Comparatively,the cell has better performance when treated with 1,4-dioxane,but its discharge property was depressed after 50 cycles.Further measurements show that the performance of lithium electrode can be improved greatly if it is pretreated in the following project: 1,4-dioxane(70%)+electrolyte(30%)+LiPF6(saturated concentration).The cycling life increases about 20%,and the discharge plateau at 80th cycle increases about 200 mV. |
| Key words: rechargeable lithium battery lithium metal electrode surface pre-treatment 1,3-dioxolane 1,4-dioxane tetrahydrofuran |
