Cell‐Shearing Chemistry Directed Closed‐Pore Regeneration in Biomass‐Derived Hard Carbons for Ultrafast Sodium Storage

Abstract The closed‐pore structure of hard carbons holds the key to high plateau capacity and rapid diffusion kinetics when applied as sodium‐ion battery (SIB) anodes. However, understanding and establishing the structure‐electrochemistry relationship still remains a significant challenge. This work, for the first time, introduces an innovative deep eutectic solvent (DES) cell‐shearing strategy to precisely tailor the cell structure of natural bamboo and consequently the closed‐pore in its derived hard carbons. The DES shearing force effectively modifies the pore architecture by simultaneously shearing and dissolving amorphous components to form closed pore cores with adjustable sizes, as well as…

• NN
  National Natural Science Foundation of China

  Awards: 51933007, 52273250, 52373047
• SU
  Sichuan University

  Award: 2020SCUNG203
• SK
  State Key Laboratory of Polymer Materials Engineering

  Award: sklpme‐2023‐1‐03
• NS
  Natural Science Foundation of Sichuan Province

  Award: 2022NSFSC0248