期刊
ENERGY STORAGE MATERIALS
卷 13, 期 -, 页码 323-328出版社
ELSEVIER
DOI: 10.1016/j.ensm.2018.02.005
关键词
Lithium metal anode; Lithium anode protection; Dendrite-free; 3D host; Lithium metal battery
资金
- National Natural Science Foundation of China [NSFC-51772241]
- Key Research Program of Shaanxi Province [2017ZDXM-GY-035]
- State Key Laboratory of Electrical Insulation and Power Equipment (Xi'an Jiaotong University) [EIPE17306, EIPE18308]
- Fundamental Research Funds for the Central Universities [zrzd2017004, xjj2017076, 16lgzd02]
- Guangdong Youth Top-notch Talent Support Program [2015TQ01C201]
Featuring light weight and high specific capacity, lithium (Li) metal anode has been regarded as the Holy Grail for lithium-ion based batteries. The barriers in terms of mossy and dendritic Li formation and infinite volume expansion should be overcome before its application in practice. Herein, we propose a three-dimensional (3D) CNT host on Cu foil, serving as an integrated electrode (C-host@Cu) to stabilize Li metal cyclic behavior. The 3D host is prepared by growing CNT sponge on the Cu substrate directly and seamlessly. Stable cycling with high Coulombic efficiency of similar to 99% is achieved at a current density of 1 mA/cm(2) over 250 cycles. In contrast, the bare Cu electrode presents a mossy-like Li morphology with a low Coulombic efficiency of similar to 60% after 150 cycles. The results reveal that the effective manipulation of Li deposition in this unique 3D host successfully suppresses the growth of Li dendrites.
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