Superior K-storage cyclability
Mechanistic comparison in potassium-ion batteries reveals that SnSe₂@C benefits from the formation of highly conductive Se during the first depotassiation, leading to superior cycling and rate performance.
Yu, Huang · Wei, Wenrui · Haider, Rizwan · Ding, Shengqi · Wu, Liang · Zhang, Yixiao · Gu, Yueliang · Wen, Wen · Yuan, Xianxia
Chemical Engineering Journal 2024
First elucidation of K storage mechanism of SnSe₂@C in potassium-ion batteries
SnSe₂@C generates conductive Se during first depotassiation, while SnSe@C suffers partial irreversible KxSe decomposition
SnSe₂@C exhibits better K storage performance than SnSe@C due to improved conductivity and faster K+ kinetics