Open AccessNovel Li 3 VO 4 Nanostructures Grown in Highly Efficient Microwave Irradiation Strategy and Their In‐Situ Lithium Storage Mechanism
Author(s) -
Sun Yan,
Li Chunsheng,
Yang Chen,
Dai Guoliang,
Li Lin,
Hu Zhe,
Wang Didi,
Liang Yaru,
Li Yuanliang,
Wang Yunxiao,
Xu Yanfei,
Zhao Yuzhen,
Liu Huakun,
Chou Shulei,
Zhu Zhu,
Wang Miaomiao,
Zhu Jiahao
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.202103493
Subject(s) - materials science , nanostructure , lithium (medication) , nanotechnology , transmission electron microscopy , in situ , chemical engineering , ion , diffusion , nanowire , irradiation , electrode , chemistry , medicine , physics , organic chemistry , endocrinology , nuclear physics , engineering , thermodynamics
The investigation of novel growth mechanisms for electrodes and the understanding of their in situ energy storage mechanisms remains major challenges in rechargeable lithium‐ion batteries. Herein, a novel mechanism for the growth of high‐purity diversified Li 3 VO 4 nanostructures (including hollow nanospheres, uniform nanoflowers, dispersed hollow nanocubes, and ultrafine nanowires) has been developed via a microwave irradiation strategy. In situ synchrotron X‐ray diffraction and in situ transmission electron microscope observations are applied to gain deep insight into the intermediate Li 3+ x VO 4 and Li 3+ y VO 4 phases during the lithiation/delithiation mechanism. The first‐principle calculations show that lithium ions migrate into the nanosphere wall rapidly along the (100) plane. Furthermore, the Li 3 VO 4 hollow nanospheres deliver an outstanding reversible capacity (299.6 mAh g −1 after 100 cycles) and excellent cycling stability (a capacity retention of 99.0% after 500 cycles) at 200 mA g −1 . The unique nanostructure offers a high specific surface area and short diffusion path, leading to fast thermal/kinetic reaction behavior, and preventing undesirable volume expansion during long‐term cycling.