Fabrication and Shell Optimization of Synergistic TiO2‐MoO3 Core–Shell Nanowire Array Anode for High Energy and Power Density Lithium‐Ion Batteries |
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Authors: | Chong Wang Lingxia Wu Hai Wang Wenhua Zuo Yuanyuan Li Jinping Liu |
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Affiliation: | 1. School of Chemistry, Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, Hubei, P. R. China;2. Institute of Nanoscience and Nanotechnology, Department of Physics, Central China Normal University, Wuhan, Hubei, P. R. China;3. School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, P. R. China |
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Abstract: | A novel synergistic TiO2‐MoO3 (TO‐MO) core–shell nanowire array anode has been fabricated via a facile hydrothermal method followed by a subsequent controllable electrodeposition process. The nano‐MoO3 shell provides large specific capacity as well as good electrical conductivity for fast charge transfer, while the highly electrochemically stable TiO2 nanowire core (negligible volume change during Li insertion/desertion) remedies the cycling instability of MoO3 shell and its array further provides a 3D scaffold for large amount electrodeposition of MoO3. In combination of the unique electrochemical attributes of nanostructure arrays, the optimized TO‐MO hybrid anode (mass ratio: ca. 1:1) simultaneously exhibits high gravimetric capacity (ca. 670 mAh g?1; approaching the hybrid's theoretical value), excellent cyclability (>200 cycles) and good rate capability (up to 2000 mA g?1). The areal capacity is also as high as 3.986 mAh cm?2, comparable to that of typical commercial LIBs. Furthermore, the hybrid anode was assembled for the first time with commercial LiCoO2 cathode into a Li ion full cell, which shows outstanding performance with maximum power density of 1086 W kgtotal ?1 (based on the total mass of the TO‐MO and LiCoO2) and excellent energy density (285 Wh kgtotal ?1) that is higher than many previously reported metal oxide anode‐based Li full cells. |
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Keywords: | energy/power density Li‐ion full cell MoO3 synergistic nanowire array TiO2 |
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