Solid polymer electrolytes: Ion conduction mechanisms and enhancement strategies

Solid polymer electrolytes (SPEs) possess comprehensive advantages such as high flexibility, low interfacial resistance with the electrodes, excellent film-forming ability, and low price, however, their applications in solid-state batteries are mainly hindered by the insufficient ionic conductivity especially below the melting temperatures, etc. To improve the ion conduction capability and other properties, a variety of modification strategies have been exploited. In this review article, we scrutinize the structure characteristics and the ion transfer behaviors of the SPEs (and their composites) and then disclose the ion conduction mechanisms. The ion transport involves the ion hopping and the polymer…

• NN
  National Natural Science Foundation of China

  Awards: 52072121, 52102245, 51972110, 52272200, HNKJ20-H88
• CP
  China Postdoctoral Science Foundation

  Award: 2022M721129
• SK
  State Key Laboratory Of Alternate Electrical Power System With Renewable Energy Sources

  Awards: LAPS21004, LAPS202114
• FR
  Fundamental Research Funds for the Central Universities

  Awards: 2020MS023, 2021MS028, 2020MS028, 2022MS030