Biotemplated fabrication of a novel hierarchical porous C/LiFePO4/C composite for Li-ion batteries
Biotemplated fabrication of a novel hierarchical porous C/LiFePO4/C composite for Li-ion batteries
复制标题
DOI：
10.1039/c4ra11816b
复制
发表时间：
2015
期刊：
影响因子：
3.9
通讯作者：
Jianjun Song;Lin Wang;Zhipeng Ma;Zhiling Du;Guangjie Shao;L. Kong;Weimin Gao
中科院分区：
文献类型：
--
作者：
Jianjun Song;Lin Wang;Zhipeng Ma;Zhiling Du;Guangjie Shao;L. Kong;Weimin Gao
层次化多孔复合材料是一种极具潜力的高倍率阴极材料。本研究提出了一种简单的溶胶-凝胶法制备分层多孔C/LiFePO4/生物C复合材料的方法，该材料以蒿囊壳为天然生物碳模板。C/LiFePO4/bio-C复合材料在5℃、10℃和20℃下的放电容量分别为105 mA h g−1、93 mA h g−1和80 mA h g−1，具有优异的电化学性能。值得注意的是，即使在6800 mA g−1的高电流密度下，它也能产生69.1 mA h g−1的高放电容量，并且在50次循环后也不会褪色。
Hierarchical porous composites are a potentially attractive material for high-rate cathode. This work presents a facile sol–gel process for the fabrication of a hierarchical porous C/LiFePO4/bio-C composite by using artemia cyst shells as natural biological carbon templates. The C/LiFePO4/bio-C composite exhibits a superior electrochemical performance with discharge capacities of 105 mA h g−1, 93 mA h g−1 and 80 mA h g−1 at 5 C, 10 C and 20 C, respectively. Remarkably, it produces a high discharge capacity of 69.1 mA h g−1 and no fading after 50 cycles even at a high current density of 6800 mA g−1.