Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 39, Pages 35683-35692Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b10595
Keywords
alternating copolymer; electrolyte solvent; single-ion solid polymer electrolyte; ultrahigh conductivity; dendrite-free lithium metal battery
Funding
- National Natural Science Funds for Distinguished Young Scholars [51425306]
- National Key RAMP
- D Program of China [2016YFA0202302]
- State Key Program of National Natural Science Foundation of China [51633007]
- National Natural Science Foundation of China [51573125, 51573147]
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Significant progress has been made to replace graphite anode materials with Li metal in next-generation Li ion batteries, called Li metal batteries (LMBs). However, the development of practical LMBs requires the suppression of Li dendrites. Owing to their ability to relax polarization, single-ion solid polymer electrolytes (SSPEs) are widely considered as an effective strategy for preventing dendrite generation. The novel SSPE membrane prepared in this work, which consists of a polymeric lithium salt modified with an electrolyte solvent, shows single-ion conducting behavior that results in the effective restriction of Li dendritic growth. The SSPE membrane delivers an ionic conductivity as high as 1.42 x 10(-4) S cm(-1) at room temperature. A LiFePO4 (LFP) coin cell assembled with the SSPE membrane shows excellent rate performance and outstanding cycling stability. In addition, the LFP flexible battery using the SSPE membrane exhibits good practicability and environmental adaptability.
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