Yttrium substituting in Mn site to improve electrochemical kinetics activity of sol-gel synthesized LiMnPO4/C as cathode for lithium ion battery
Yttrium substituting in Mn site to improve electrochemical kinetics activity of sol-gel synthesized LiMnPO4/C as cathode for lithium ion battery
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钇取代Mn位提高溶胶-凝胶合成LiMnPO4/C作为锂离子电池正极的电化学动力学活性
DOI：
10.1007/s10008-017-3662-8
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发表时间：
2017-06
影响因子：
2.5
通讯作者：
Yuchun Zhai
中科院分区：
文献类型：
--
作者：
Jun Zhang;Shaohua Luo;Qing Wang;Zhiyuan Wang;Yahui Zhang;Aimin Hao;Yanguo Liu;Qian Xu;Yuchun Zhai
以乙醇酸为螯合剂和碳源，采用溶胶-凝胶法制备了LiMn 1-xYxPO 4/C（x = 0，0.01，0.02，0.04）材料。investigated.byX射线衍射（XRD）、扫描电子显微镜（SEM）、X射线能谱（EDS）、透射电子显微镜（TEM）、充放电测试和电化学阻抗谱（EIS）等分析方法，研究了多元化合物LiMn 1-xYxPO 4/C的典型结构、微观形貌和电化学性能。结果表明，钇掺杂量为1mol%时，LiMnPO 4/C复合材料的颗粒尺寸最小，且分布均匀。在所有样品中，LiMn0.99Y0.01PO4/C显示出长期循环性能和倍率性能，在0.05、0.1、0.5和1 C下的放电容量分别为153.6、150.8、148.7和146.7 mAh g−1。50次循环后，放电比容量为148.1 mAh g-1，0.05 C倍率下的容量保持率为3.6%。因此，稀土金属离子掺杂是提高该类材料电化学性能的有效途径。
LiMn1-xYxPO4/C (x = 0, 0.01, 0.02, 0.04) materials have been prepared by a simple sol-gel method using glycollic acid as chelating agent and carbon source. The typical structure, micromorphology, and electrochemical properties of the multi-component compound LiMn1-xYxPO4/C have been investigated.by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), chargedischarge tests, and electrochemical impedance spectroscopy (EIS) analysis method. The results indicate that a 1 mol% yttrium substitution of LiMnPO4/C composite material has the smallest particle size and uniform distribution. Among all the samples, LiMn0.99Y0.01PO4/C shows long-term cycling performance and rate capability with the discharge capacity of 153.6, 150.8, 148.7, and 146.7 mAh g−1 at 0.05, 0.1, 0.5 and 1 C, respectively. After 50 cycles, the specific discharge capacity is 148.1 mAh g−1 with capacity retention of 3.6% at 0.05 C rate. In conclusion, rare metal ion substitution is an.effective route to improve the electrochemical performance of this kind of materials.
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影响因子：
9.2
作者：
Muxina Konarova;I. Taniguchi
通讯作者：
Muxina Konarova;I. Taniguchi
影响因子：
6.6
作者：
A. Churikov
通讯作者：
A. Churikov
影响因子：
9.2
作者：
Kobayashi, Genki;Yamada, Atsuo;Miyashiro, Hajime
通讯作者：
Miyashiro, Hajime
影响因子：
2.8
作者：
Prabu, M.;Selvasekarapandian, S.;Sanjeeviraja, C.
通讯作者：
Sanjeeviraja, C.
影响因子：
3.9
作者：
Martha, S. K.;Markovsky, B.;Exnar, I.
通讯作者：
Exnar, I.