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化学与材料
材料化学前沿
Vol. 2 No. 2 (April 2014)
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Li-Cu合金作为锂电池负极材料的电化学性能
Electrochemical Properties of Lithium-Rich Li-Cu Alloy Anode Prepared by Electrodeposition for Lithium Batteries
DOI:
10.12677/AMC.2014.22002
,
PDF
,
HTML
,
,
被引量
下载: 4,511
浏览: 16,008
国家自然科学基金支持
作者:
燕 波
,
崔 莹
,
安茂忠
,
杨培霞
,
张锦秋
,
赵彦彪
:哈尔滨工业大学国家水资源与环境重点实验室,哈尔滨工业大学化工学院,哈尔滨
关键词:
Li-Cu合金
;
Li-Cu/LiFePO4电池
;
SEI膜
;
Li-Cu Alloy
;
Li-Cu/LiFePO4 Cells
;
SEI Layers
摘要:
从含有
LiTFSI
和
Cu(
p
-oTs)
2
的
1-
乙基
-3-
甲基咪唑双三氟甲磺酰亚胺盐和
N-
甲基吡咯烷酮混合体系中电沉积出了
Li-Cu
合金。循环伏安测试表明,当
Li
从
Li-Cu
合金上溶解后,留下的
Cu
骨架仍然可以保持稳定。
Li-Cu/LiFePO
4
电池的充放电测试表明当以
0.2C
的倍率充放电
20
个循环以后,电池的比容量可稳定保持在
138.96 mAh/g
。电化学阻抗谱和塔菲尔曲线测试表明在经过四个充放电循环后或者在电解液中浸泡三天以后,在
Li-Cu
合金表面形成了稳定的
SEI
膜
。
Li-Cu alloy was electrodeposited from
[EMIm][TFSI] with N-methyl-2-pyrrolidone (NMP
)
containing mixtures of LiTFSI and Cu(
p
-oTs)
2
. The cyclic voltammetry for Li-Cu alloy indicated that the Cu frame could maintain stable when Li dissolved from the Li-Cu alloy. T
he charge-discharge performances
of
Li-Cu/LiFePO
4
cells
showed good stability with the specific capacity of
138.96 mAh/g after 20 cycles at 0.2C.
The EIS and Tafel curves proved that
stable
SEI layers were formed after the fourth
charge-discharge
cycle or being
immersed in the electrolyte for
3 days
.
文章引用:
燕波, 崔莹, 安茂忠, 杨培霞, 张锦秋, 赵彦彪. Li-Cu合金作为锂电池负极材料的电化学性能[J]. 材料化学前沿, 2014, 2(2): 5-12.
http://dx.doi.org/10.12677/AMC.2014.22002
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