Dendrite-free Li metal anode enabled by a 3D free-standing lithiophilic nitrogen-enriched carbon sponge

被引：65

作者：

Hou, Guangmei ^{[1
]}

Ren, Xiaohua ^{[1
]}

Ma, Xiaoxin ^{[1
]}

Zhang, Le ^{[1
]}

Zhai, Wei ^{[1
]}

Ai, Qing ^{[1
]}

Xu, Xiaoyan ^{[1
]}

Zhang, Lin ^{[1
]}

Si, Pengchao ^{[1
]}

Feng, Jinkui ^{[1
]}

Ding, Fei ^{[2
]}

Ci, Lijie ^{[1
]}

机构：

[1] Shandong Univ, Sch Mat Sci & Engn, Minist Educ, SDU & Rice Joint Ctr Carbon Nanomat,Key Lab Liqui, Jinan 250061, Shandong, Peoples R China

[2] Tianjin Inst Power Sources, Natl Key Lab Power Sources, Tianjin 300384, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2018年 / 386卷

关键词：

Battery; Li dendrites; Free-standing; Lithiophilic matrix; Li metal anode; UNIFORM LITHIUM DEPOSITION; SOLID-ELECTROLYTE; IN-SITU; PERFORMANCE; IMPROVEMENT; NUCLEATION; REDUCTION; BATTERIES; MATRIX; GROWTH;

D O I：

10.1016/j.jpowsour.2018.03.049

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Lithium metal is considered as the ultimate anode material for high-energy Li battery systems. However, the commercial application of lithium anode is impeded by issues with safety and low coulombic efficiency induced by Li dendrite growth. Herein, a free-standing three-dimensional nitrogen-enriched graphitic carbon sponge with a high nitrogen content is proposed as a multifunctional current collect for Lithium accommodation. The abundant lithiophilic N-containing functional groups are served as preferred nucleation sites to guide a uniform Li deposition. In addition, the nitrogen-enriched graphitic carbon sponge with a high specific surface area can effectively reduce the local current density. As a result of the synergistic effect, the nitrogen-enriched graphitic carbon sponge electrode realizes a long-term stable cycling without dendrites formation. Notably, the as-obtained composite electrode can deliver an ultra-high specific capacity of similar to 3175 mA h g(-1). The nitrogen-enriched graphitic carbon sponge might provide innovative insights to design a superior matrix for dendrite-free Li anode.

引用

页码：77 / 84

页数：8

共 43 条

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