Open AccessAlloying Motif Confined in Intercalative Frameworks toward Rapid Li‐Ion Storage
Author(s) -
Lin Xueyu,
Dong Chenlong,
Zhao Siwei,
Peng Baixin,
Zhou Ce,
Wang Ruiqi,
Huang Fuqiang
Publication year - 2022
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202202026
Subject(s) - anode , materials science , intercalation (chemistry) , electrochemistry , chemical engineering , vanadium , lithium (medication) , oxide , nanotechnology , metallurgy , inorganic chemistry , chemistry , electrode , medicine , engineering , endocrinology
High‐capacity alloying‐type anodes suffer poor rate capability due to their great volume expansion, while high‐rate intercalation‐type anodes are troubled with low theoretical capacity. Herein, a novel mechanism of alloying in the intercalative frameworks is proposed to confer both high‐capacity and high‐rate performances on anodes. Taking the indium‐vanadium oxide (IVO) as a typical system, alloying‐typed In is dispersed in the stable intercalative V 2 O 3 to form a solid solution. The alloying‐typed In element provides high lithium storage capacity, while the robust, Li‐conductive V−O frameworks effectively alleviate the volume expansion and aggregation of In. Benefiting from the above merits, the anode exhibits a high specific capacity of 1364 mA h g −1 at 1 A g −1 and an extraordinary cyclic performance of 814 mA h g −1 at 10 A g −1 after 600 cycles (124.9 mA h g −1 after 10 000 cycles at 50 A g −1 ). The superior electrochemical rate capability of (In,V) 2 O 3 solid solution anode rivals that of the reported alloying anode materials. This strategy can be extended for fabricating other alloying/intercalation hybrid anodes, such as (Sn,V)O 2 and (Sn,Ti)O 2 , which demonstrates the universality of confining alloying motifs in intercalative frameworks for rapid and high‐capacity lithium storage.