Advanced Bismuth-Based Anode Materials for Efficient Potassium Storage: Structural Features, Storage Mechanisms and Modification Strategies

Abstract Potassium-ion batteries (PIBs) are considered as a promising energy storage system owing to its abundant potassium resources. As an important part of the battery composition, anode materials play a vital role in the future development of PIBs. Bismuth-based anode materials demonstrate great potential for storing potassium ions (K + ) due to their layered structure, high theoretical capacity based on the alloying reaction mechanism, and safe operating voltage. However, the large radius of K + inevitably induces severe volume expansion in depotassiation/potassiation, and the sluggish kinetics of K + insertion/extraction limits its further development. Herein, we summarize the strategies used to improve…

• NN
  National Natural Science Foundation of China

  Award: 22209057