Premium
Bismuth Microparticles as Advanced Anodes for Potassium‐Ion Battery
Author(s) -
Huang Jiaqiang,
Lin Xiuyi,
Tan Hong,
Zhang Biao
Publication year - 2018
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201703496
Subject(s) - materials science , anode , electrolyte , electrochemistry , bismuth , lithium (medication) , chemical engineering , battery (electricity) , electrode , potassium , diglyme , ion , potassium ion battery , nanotechnology , chemistry , thermodynamics , lithium vanadium phosphate battery , solvent , metallurgy , power (physics) , physics , organic chemistry , engineering , medicine , endocrinology
Potassium‐ion batteries (KIBs) are important alternatives to lithium‐ and sodium‐ion batteries. Herein, microsized a Bi electrode delivers exceptional potassium storage capacity, stability, and rate capability by the formation of an elastic and adhesive oligomer‐containing solid electrolyte interface with the assistance of diglyme electrolytes. The kinetics‐controlled K–Bi phase transitions are unraveled combining electrochemical profiles, in situ X‐ray diffraction and density functional theory calculations. Reversible, stepwise Bi–KBi 2 –K 3 Bi 2 –K 3 Bi transitions govern the electrochemical processes after the initial continuous surface potassiation. The Bi electrode outperforms the other anode counterparts considering both capacity and potential. This work provides critical insights into the rational design of high‐performance anode materials for KIBs.