材料科学
阳极
法拉第效率
铜
电解质
集电器
电极
金属锂
多孔性
箔法
化学工程
纳米技术
复合材料
金属
冶金
化学
物理化学
工程类
作者
Kui Lin,Tong Li,Shun-Wai Chiang,Ming Liu,Xianying Qin,Xiangyang Xu,Lihan Zhang,Feiyu Kang,Guohua Chen,Baohua Li
出处
期刊:Small
[Wiley]
日期:2020-08-14
卷期号:16 (37)
被引量:33
标识
DOI:10.1002/smll.202001784
摘要
Suppressing the dendrite formation and managing the volume change of lithium (Li) metal anode have been global challenges in the lithium batteries community. Herein, a duplex copper (Cu) foil with an ant-nest-like network and a dense substrate is reported for an ultrastable Li metal anode. The duplex Cu is fabricated by sulfurization of thick Cu foil with a subsequent skeleton self-welding procedure. Uniform Li deposition is achieved by the 3D interconnected architecture and lithiophilic surface of self-welded Cu skeleton. The sufficient space in the porous layer enables a large areal capacity for Li and significantly improves the electrode-electrolyte interface. Simulations reveal that the structure allows proper electric field penetration into the connected tunnels. The assembled Li anodes exhibit high coulombic efficiency (97.3% over 300 cycles) and long lifespan (>880 h) at a current density of 1 mA cm-2 with a capacity of 1 mAh cm-2 . Stable and deep cycling can be maintained up to 50 times at a high capacity of 10 mAh cm-2 .
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