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Title: A polymeric composite protective layer for stable Li metal anodes

Journal Article · · Nano Convergence
 [1];  [2];  [3];  [2];  [4];  [2];  [5];  [3]; ORCiD logo [2]
  1. Beijing Univ. of Chemical Technology (China); Beijing Univ. of Technology (China)
  2. Tsinghua Univ., Beijing (China)
  3. Beijing Univ. of Technology (China)
  4. Argonne National Lab. (ANL), Argonne, IL (United States)
  5. Beijing Univ. of Chemical Technology (China); Beijing Inst. of Petrochemical Technology (China)

Lithium (Li) metal is a promising anode for high-performance secondary lithium batteries with high energy density due to its highest theoretical specific capacity and lowest electrochemical potential among anode materials. However, the dendritic growth and detrimental reactions with electrolyte during Li plating raise safety concerns and lead to premature failure. Herein, we report that a homogeneous nanocomposite protective layer, prepared by uniformly dispersing AlPO4 nanoparticles into the vinylidene fluoride-co-hexafluoropropylene matrix, can effectively prevent dendrite growth and lead to superior cycling performance due to synergistic influence of homogeneous Li plating and electronic insulation of polymeric layer. The results reveal that the protected Li anode is able to sustain repeated Li plating/stripping for >750 cycles under a high current density of 3 mA cm-2 and under a practical specific capacity of 2 mAh cm-2 . Moreover, full-cell Li-ion battery is constructed by using LiFePO4 and protected Li as a cathode and anode, respectively, rendering a stable capacity after 400 charge/discharge cycles. The current work presents a promising approach to stabilize Li metal anodes for next-generation Li secondary batteries.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office; National Natural Science Foundation of China (NSFC); Ministry of Science and Technology of China; Tsinghua Univ. (China)
Grant/Contract Number:
AC02-06CH11357; U1564205; 2019YFE0100200; 2019YFA0705703; 2019Z02UTY06
OSTI ID:
1765888
Journal Information:
Nano Convergence, Vol. 7, Issue 1; ISSN 2196-5404
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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