期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 28, 页码 31542-31551出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c09503
关键词
lithium dendrites; three-dimensional ordered macro/mesoporous; pulse plating; Zn coating; lithiophilic
资金
- National Natural Science Foundation of China [U1802254, 51871201]
- Zhejiang Provincial Natural Science Foundation of China [LY15E040002, LY18E040003]
Li dendrites are considered as the primary cause for degradation and inevitable short circuit in lithium-metal batteries (LMBs). Although contemporary strategies have shown potential for addressing dendrite growth, none have achieved complete elimination. In this paper, a dendrite-free, three-dimensional, ordered, macro/mesoporous Cu/Zn current collector was prepared using a combination of simple colloidal crystal template and electrochemical method (electrodeposition and pulse plating). When paired with a hierarchically structured mesoporous (20-50 nm) and macroporous (450 nm) anode, this novel current collector achieved stable charge/discharge cycles of over 2000 h and a small plating/stripping potential (approximate to 8 mV) at a current density of 0.2 mA cm(-2). Coulombic efficiencies (CE) also reached 94.7% after 400 cycles. This three-dimensional, ordered, macro/mesoporous structure provides a greater specific surface area, reduces local current density, and contains a lithiophilic Zn coating that serves as preferred Li nucleation sites. By combining these factors, dendrite-free Li deposition and superior electrochemical performance improvements in LMBs have been realized.
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