材料科学
阳极
制作
纳米线
阴极
重量分析
电化学
功率密度
化学工程
氧化物
纳米技术
锂(药物)
纳米结构
电极
功率(物理)
物理化学
冶金
有机化学
工程类
内分泌学
物理
病理
医学
化学
替代医学
量子力学
作者
Chong Wang,Lingxia Wu,Hai Wang,Wenhua Zuo,Yuanyuan Li,Jinping Liu
标识
DOI:10.1002/adfm.201500634
摘要
A novel synergistic TiO 2 ‐MoO 3 (TO‐MO) core–shell nanowire array anode has been fabricated via a facile hydrothermal method followed by a subsequent controllable electrodeposition process. The nano‐MoO 3 shell provides large specific capacity as well as good electrical conductivity for fast charge transfer, while the highly electrochemically stable TiO 2 nanowire core (negligible volume change during Li insertion/desertion) remedies the cycling instability of MoO 3 shell and its array further provides a 3D scaffold for large amount electrodeposition of MoO 3 . 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 LiCoO 2 cathode into a Li ion full cell, which shows outstanding performance with maximum power density of 1086 W kg total −1 (based on the total mass of the TO‐MO and LiCoO 2 ) and excellent energy density (285 Wh kg total −1 ) that is higher than many previously reported metal oxide anode‐based Li full cells.
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