Co-hydrothermal synthesis of LiMn23/24Mg1/24PO4·LiAlO2/C nano-hybrid cathode material with enhanced electrochemical performance for lithium-ion batteries
Co-hydrothermal synthesis of LiMn23/24Mg1/24PO4·LiAlO2/C nano-hybrid cathode material with enhanced electrochemical performance for lithium-ion batteries
复制标题
共水热合成增强锂离子电池电化学性能的LiMn(23/24)Mg(1/24)PO4.LiAlO2/C纳米杂化正极材料
DOI：
10.1016/j.apsusc.2016.10.056
复制
发表时间：
2017-02
影响因子：
6.7
通讯作者：
Yahui Zhang
中科院分区：
文献类型：
--
作者：
Jun Zhang;Shaohua Luo;Longjiao Chang;Aimin Hao;Zhiyuan Wang;Yanguo Liu;Qian Xu;Qing Wang;Yahui Zhang
以Li 2CO 3、AAO和Mn 1-xMgxPO 4为原料，在水/PEG体系中采用共水热法合成了LiMn 23/24 Mg 1/24 PO 4·LiAlO 2/C。通过第一性原理计算和XRD、SEM、TEM等实验研究，研究了多元复合LiMn 1-xMgxPO 4/C（x = 0，1/24，1/12，1/6）和纳米杂化LiMn 23/24 Mg 1/24 PO 4·LiAlO 2/C正极材料的电子结构和微观形貌。LiMn 23/24 Mg 1/24 PO 4/C的禁带宽度为2.296 eV，低于其它Mg ~（2+）掺杂比例的样品。电化学测试结果表明，LiMn 23/24 Mg 1/24 PO 4/C具有较好的循环性能和倍率性能，在0.05C、0.1C、0.5C和1C下的放电容量依次为143.5mAh/g、141.5mAh/g、139.2mAh/g和136.3mAh/g。采用共水热法合成LiMn 23/24 Mg 1/24 PO 4·LiAlO 2/C复合材料，首次放电容量达到151.8 mAh/g，表明Mg 2+掺杂与LiAlO 2复合材料共改性可以通过促进锂离子在材料内部的扩散速率来提高LiMnPO 4/C的电子电导率。
LiMn23/24Mg1/24PO4·LiAlO2/C is synthesized by a co-hydrothermal method in water/PEG system using Li2CO3, AAO and Mn1-xMgxPO4 as raw material. The electronic structure and micromorphology of multi-component compound LiMn1-xMgxPO4/C (x = 0, 1/24, 1/12, 1/6) and nano-hybrid LiMn23/24Mg1/24PO4·LiAlO2/C cathode materials are studied by first-principles calculation and experimental research including XRD, SEM, TEM. The calculated band gap of LiMn23/24Mg1/24PO4/C is 2.296 eV, which is lower than other percentages Mg2+ doping samples. Electrochemical tests exhibit LiMn23/24Mg1/24PO4/C has better cycling performance and rate capability than other contents Mg2+ doping samples with the discharge capacity of 143.5 mAh/g, 141.5 mAh/g, 139.2 mAh/g and 136.3 mAh/g at 0.05C, 0.1C, 0.5C and 1C in order. After compositing and preparation of LiMn23/24Mg1/24PO4·LiAlO2/C composite material by co-hydrothermal route, the initial discharge capacity reaches up to 151.8 mAh/g, which suggests that co-modified with Mg2+ doping and LiAlO2 compositing material can improve the electronic conductivity.of LiMnPO4/C by facilitating the lithium ion diffusion rate in the interior of the materials.
登录
查看更多内容
影响因子：
6.6
作者：
H. Yi;Chen Hu;H. Fang;Bin Yang;Yaochun Yao;Wenhui Ma;Yong-nian Dai
通讯作者：
H. Yi;Chen Hu;H. Fang;Bin Yang;Yaochun Yao;Wenhui Ma;Yong-nian Dai
影响因子：
9.2
作者：
Cheng, Fuquan;Xin, Yuelong;Zhang, Xinxiang
通讯作者：
Zhang, Xinxiang
影响因子：
9.2
作者：
Muxina Konarova;I. Taniguchi
通讯作者：
Muxina Konarova;I. Taniguchi
影响因子：
2.9
作者：
Guo-Jing Sun;B. Jin;Guang-ping Sun;E. Jin;H. Gu;Q. Jiang
通讯作者：
Guo-Jing Sun;B. Jin;Guang-ping Sun;E. Jin;H. Gu;Q. Jiang
影响因子：
9.2
作者：
Kobayashi, Genki;Yamada, Atsuo;Miyashiro, Hajime
通讯作者：
Miyashiro, Hajime