Study on sodium ion supplementation performance of CNT-coated sodium oxalate in sodium ion batteries.

ABSTRACT: Low initial coulombic efficiency of hard carbon anodes and irreversible sodium loss during cycling in sodium-ion batteries (SIBs) lead to reduced specific capacity and shortened cycle life. Introducing sodium supplementation can effectively enhance the specific capacity and cycle life of SIBs. Na₂C₂O₄ was selected as the sodium compensation agent owing to its high theoretical capacity, excellent chemical stability, and environmental friendliness. To improve conductivity and reduce decomposition voltage of Na₂C₂O₄, carbon nanotubes (CNTs) were employed for coating. The optimized 10% CNT-coated sodium oxalate (CNT-10@Na₂C₂O₄) exhibited a reduced initial decomposition voltage of 3.82 V (vs. Na

SUBMITTER: Tao S 

PROVIDER: S-EPMC12855588 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature