†Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Kyungbuk 790-784, Republic of Korea.
‡Beamline Division, Pohang Accelerator Laboratory, Pohang, Kyungbuk 790-784, Republic of Korea.
ACS Nano. 2015 May 26;9(5):5299-309. doi: 10.1021/acsnano.5b00817. Epub 2015 Apr 15.
We report mesoporous composite materials (m-GeO2, m-GeO2/C, and m-Ge-GeO2/C) with large pore size which are synthesized by a simple block copolymer directed self-assembly. m-Ge/GeO2/C shows greatly enhanced Coulombic efficiency, high reversible capacity (1631 mA h g(-1)), and stable cycle life compared with the other mesoporous and bulk GeO2 electrodes. m-Ge/GeO2/C exhibits one of the highest areal capacities (1.65 mA h cm(-2)) among previously reported Ge- and GeO2-based anodes. The superior electrochemical performance in m-Ge/GeO2/C arises from the highly improved kinetics of conversion reaction due to the synergistic effects of the mesoporous structures and the conductive carbon and metallic Ge.
我们报告了通过简单的嵌段共聚物导向自组装合成的具有大孔径的介孔复合材料（m-GeO2、m-GeO2/C 和 m-Ge-GeO2/C）。与其他介孔和块状 GeO2 电极相比，m-Ge/GeO2/C 具有更高的库仑效率、高可逆容量（1631 mA h g(-1))）和稳定的循环寿命。m-Ge/GeO2/C 表现出之前报道的基于 Ge 和 GeO2 的阳极中最高的面容量之一（1.65 mA h cm(-2))。m-Ge/GeO2/C 的优异电化学性能源于转化反应动力学的极大改善，这是由于介孔结构、导电碳和金属 Ge 的协同作用。
