TY - JOUR
T1 - Constructing radially oriented macroporous spheres with central cavities as ultrastable lithium-ion battery anodes
AU - Zhang, Yu
AU - Xu, Yong
AU - Ji, Yongjun
AU - Wang, Xi
AU - Li, Jing
AU - Liu, Hezhi
AU - Wang, Dingsheng
AU - Zhong, Ziyi
AU - Bando, Yoshio
AU - Su, Fabing
N1 - Publisher Copyright:
© 2018
PY - 2019/2
Y1 - 2019/2
N2 - Huge volume expansion and structural degradation of transition-metal oxide electrode materials upon cycling often lead to severe capacity fading in lithium ion batteries (LIBs). To overcome these technical barriers, here we report the design and synthesis of a new type of high-performance anode material composed of CuO or hybrid MxOy-CuO (M = Zn, Ni, Co, Mn or both of them), which has three unique structural features: (i) 1D porous nanorods with multi-phase intergrowth feature as building blocks, (ii) central cavity originated from the radially aligned nanorods, and (iii) constructed microspheres with low outer surface area. When applied for LIBs anode, 10ZnO-CuO exhibited high capacity retention with 612 mA h g-1 even after 600 cycles. This enhanced lithium storage is closely related to the unique structural features and the generated multi-phase synergistic effect that could facilitate fast electro/ion transport and buffer volume expansion. For example, the in-situ TEM observation confirmed that the central cavity and porous geometry had almost “zero” volume stress, thus being able to effectively accommodate the volume change; the presence of the “Job-sharing” mechanism among multi-phases contributed to the enhanced capacities, etc. This work demonstrates that this strategy is versatile and facile for constructing the 3-order hierarchy structures for various metal oxide systems, and the formed structures have ample applications in various areas.
AB - Huge volume expansion and structural degradation of transition-metal oxide electrode materials upon cycling often lead to severe capacity fading in lithium ion batteries (LIBs). To overcome these technical barriers, here we report the design and synthesis of a new type of high-performance anode material composed of CuO or hybrid MxOy-CuO (M = Zn, Ni, Co, Mn or both of them), which has three unique structural features: (i) 1D porous nanorods with multi-phase intergrowth feature as building blocks, (ii) central cavity originated from the radially aligned nanorods, and (iii) constructed microspheres with low outer surface area. When applied for LIBs anode, 10ZnO-CuO exhibited high capacity retention with 612 mA h g-1 even after 600 cycles. This enhanced lithium storage is closely related to the unique structural features and the generated multi-phase synergistic effect that could facilitate fast electro/ion transport and buffer volume expansion. For example, the in-situ TEM observation confirmed that the central cavity and porous geometry had almost “zero” volume stress, thus being able to effectively accommodate the volume change; the presence of the “Job-sharing” mechanism among multi-phases contributed to the enhanced capacities, etc. This work demonstrates that this strategy is versatile and facile for constructing the 3-order hierarchy structures for various metal oxide systems, and the formed structures have ample applications in various areas.
KW - Central cavities
KW - Interfacial storage
KW - Lithium-ion batteries
KW - Oriented macroporous spheres
KW - Volume expansion
UR - http://www.scopus.com/inward/record.url?scp=85050187672&partnerID=8YFLogxK
U2 - 10.1016/j.ensm.2018.07.011
DO - 10.1016/j.ensm.2018.07.011
M3 - 文章
AN - SCOPUS:85050187672
SN - 2405-8297
VL - 17
SP - 242
EP - 252
JO - Energy Storage Materials
JF - Energy Storage Materials
ER -
