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Tungsten Oxytetrachloride as a Positive Electrode for Chloride‐Ion Batteries
Author(s) -
Karkera Guruprakash,
Soans Mervyn,
Dasari Bosubabu,
Umeshbabu Ediga,
Cambaz Musa Ali,
Meng Zhen,
Diemant Thomas,
Fichtner Maximilian
Publication year - 2022
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.202200193
Subject(s) - electrode , tungsten , electrolyte , raman spectroscopy , battery (electricity) , cathode , chloride , x ray photoelectron spectroscopy , materials science , electrochemistry , chemical engineering , ion , inorganic chemistry , nanotechnology , chemistry , metallurgy , optics , organic chemistry , power (physics) , physics , engineering , quantum mechanics
Rechargeable chloride‐ion batteries (CIBs) are a new emerging battery technology that can potentially provide high theoretical volumetric capacities at lower cost and higher abundance. However, research on CIBs is in its early stages, and the current challenge lies in finding suitable electrodes and electrolytes. Herein, tungsten oxychloride is introduced for the first time as a cathode candidate for use in CIB. WOCl 4 enables the reversible transfer of nearly one Cl − per formula unit during electrochemical cycling, corresponding to an initial discharge capacity of 120 mAh g −1 . A reversible capacity of 90 mAh g −1 (75%) is retained after 50 cycles. Postmortem analysis of cycled electrodes by X‐ray diffraction, X‐ray photoelectron spectroscopy, and Raman spectroscopy reveals the reversible chloride‐ion transfer between the electrodes through a conversion mechanism. This work paves the way for the use of tungsten chloride‐based electrode materials for battery applications.