Structural Engineering of Hierarchical Micro-nanostructured Ge-C Framework by Controlling the Nucleation for Ultralong-Life Li Storage

被引:117
作者
Zhang, Shilin [1 ]
Zheng, Yang [1 ,2 ]
Huang, Xuejuan [3 ]
Hong, Jian [1 ]
Cao, Bin [1 ]
Hao, Junnan [1 ]
Fan, Qining [1 ]
Zhou, Tengfei [1 ,3 ]
Guo, Zaiping [1 ]
机构
[1] Univ Wollongong, Sch Mech Mat Mechatron & Biomed Engn, AIIM, ISEM, Wollongong, NSW 2522, Australia
[2] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Inst Adv Mat & Nanotechnol, Wuhan 430081, Hubei, Peoples R China
[3] South Cent Univ Nationalities, Coll Chem & Mat Sci, Wuhan 430074, Hubei, Peoples R China
基金
澳大利亚研究理事会; 中国国家自然科学基金;
关键词
germanium-carbon frameworks; lithium storage; mechanism understanding; micro-nanostructures; structural engineering; LITHIUM-ION BATTERY; HIGH-CAPACITY; SCALABLE SYNTHESIS; ANODE MATERIALS; POROUS CARBON; PARTICLES; COMPOSITE; EVOLUTION; GRAPHENE; DESIGN;
D O I
10.1002/aenm.201900081
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
The rational design of a proper electrode structure with high energy and power densities, long cycling lifespan, and low cost still remains a significant challenge for developing advanced energy storage systems. Germanium is a highly promising anode material for high-performance lithium ion batteries due to its large specific capacity and remarkable rate capability. Nevertheless, poor cycling stability and high price significantly limit its practical application. Herein, a facile and scalable structural engineering strategy is proposed by controlling the nucleation to fabricate a unique hierarchical micro-nanostructured Ge-C framework, featuring high tap density, reduced Ge content, superb structural stability, and a 3D conductive network. The constructed architecture has demonstrated outstanding reversible capacity of 1541.1 mA h g(-1) after 3000 cycles at 1000 mA g(-1) (with 99.6% capacity retention), markedly exceeding all the reported Ge-C electrodes regarding long cycling stability. Notably, the assembled full cell exhibits superior performance as well. The work paves the way to constructing novel metal-carbon materials with high performance and low cost for energy-related applications.
引用
收藏
页数:11
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