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Li/Na Ion Intercalation Process into Sodium Titanosilicate as Anode Material
Author(s) -
Liu Jingyuan,
Liu Yao,
Wang Yonggang,
Wang Congxiao,
Xia Yongyao
Publication year - 2019
Publication title -
batteries and supercaps
Language(s) - English
Resource type - Journals
ISSN - 2566-6223
DOI - 10.1002/batt.201900064
Subject(s) - anode , intercalation (chemistry) , lithium (medication) , sodium , ion , materials science , diffusion , inorganic chemistry , chemical engineering , chemistry , electrode , thermodynamics , metallurgy , organic chemistry , medicine , physics , engineering , endocrinology
A natisite structured material, Na 2 TiSiO 5 , has been investigated as anode for lithium‐ and sodium‐ion batteries. The results show that Na 2 TiSiO 5 can deliver a capacity of 260 mAh g −1 with good reversibility when used as anode in Li‐ion batteries. In contrast to the conversion reaction mechanism observed for its analogue Li 2 TiSiO 5 , a solid‐solution type intercalation mechanism is found for the lithiation/delithiation process of Na 2 TiSiO 5 . Lithium intercalation occurs through a three‐dimensional diffusion path after crossing an energy barrier around 1.0 eV. Sodium‐ions could only migrate through a one‐dimensional channel after overcoming a much higher energy barrier of 1.8 eV, which solely delivers a reversible capacity of 40 mAh g −1 for sodium‐ion storage.