{"title":"掺杂对锂离子电池LiNi0.305Mn0.33Co0.33M0.025O2 (M=Al, Y, Cr)电化学性能的影响","authors":"Meng Wang, Yunbo Chen, Lin Zhang, Lin Chen","doi":"10.1109/ICMREE.2013.6893728","DOIUrl":null,"url":null,"abstract":"LiNi<sub>0.305</sub>Mn<sub>0.33</sub>Co<sub>0.33</sub>M<sub>0.025</sub>O<sub>2</sub> (M=Al, Y, Cr) materials were synthesized via the sol-gel method. The structure and electrochemical properties were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and charge/discharge tests. The materials were maintained the α-NaFeO<sub>2</sub> type layered structure and the discharge capacity was also increased by doping. The Y- and Al- doping slightly decrease the initial discharge capacity of LiNi<sub>0.33</sub>Mn<sub>0.33</sub>Co<sub>0.33</sub>O<sub>2</sub> while the Cr-doping can increase the initial discharge capacity. The cycling performances are improved after doping. When cycled at 1.0C, about 99%, 98.6% and 97.1% of their initial capacities can be retained after 40 cycles for Y-, Al- and Cr-doped materials, respectively. Their rate capabilities are also better than that of the un-doped one. EIS measurement shows that the Y-doped electrode has the lowest resistance impedance value during cycling.","PeriodicalId":6427,"journal":{"name":"2013 International Conference on Materials for Renewable Energy and Environment","volume":"55 1","pages":"532-536"},"PeriodicalIF":0.0000,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"The doping effect on the electrochemical performance of LiNi0.305Mn0.33Co0.33M0.025O2 (M=Al, Y, Cr) for lithium-ion batteries\",\"authors\":\"Meng Wang, Yunbo Chen, Lin Zhang, Lin Chen\",\"doi\":\"10.1109/ICMREE.2013.6893728\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"LiNi<sub>0.305</sub>Mn<sub>0.33</sub>Co<sub>0.33</sub>M<sub>0.025</sub>O<sub>2</sub> (M=Al, Y, Cr) materials were synthesized via the sol-gel method. The structure and electrochemical properties were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and charge/discharge tests. The materials were maintained the α-NaFeO<sub>2</sub> type layered structure and the discharge capacity was also increased by doping. The Y- and Al- doping slightly decrease the initial discharge capacity of LiNi<sub>0.33</sub>Mn<sub>0.33</sub>Co<sub>0.33</sub>O<sub>2</sub> while the Cr-doping can increase the initial discharge capacity. The cycling performances are improved after doping. When cycled at 1.0C, about 99%, 98.6% and 97.1% of their initial capacities can be retained after 40 cycles for Y-, Al- and Cr-doped materials, respectively. Their rate capabilities are also better than that of the un-doped one. EIS measurement shows that the Y-doped electrode has the lowest resistance impedance value during cycling.\",\"PeriodicalId\":6427,\"journal\":{\"name\":\"2013 International Conference on Materials for Renewable Energy and Environment\",\"volume\":\"55 1\",\"pages\":\"532-536\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2013-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2013 International Conference on Materials for Renewable Energy and Environment\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ICMREE.2013.6893728\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2013 International Conference on Materials for Renewable Energy and Environment","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICMREE.2013.6893728","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
摘要
采用溶胶-凝胶法制备了LiNi0.305Mn0.33Co0.33M0.025O2 (M=Al, Y, Cr)材料。采用x射线衍射(XRD)、扫描电镜(SEM)、循环伏安法(CV)、电化学阻抗谱(EIS)和充放电测试等方法对其结构和电化学性能进行了表征。材料保持α-NaFeO2型层状结构，并通过掺杂提高了放电容量。Y和Al掺杂对LiNi0.33Mn0.33Co0.33O2的初始放电容量略有降低，cr掺杂对LiNi0.33Mn0.33Co0.33O2的初始放电容量有提高作用。服用兴奋剂后，自行车运动员的成绩有所提高。在1.0C下循环40次后，掺Y、掺Al和掺cr材料的初始容量分别保持在99%、98.6%和97.1%左右。它们的速率能力也比未掺杂的要好。EIS测试表明，y掺杂电极在循环过程中具有最低的电阻阻抗值。
The doping effect on the electrochemical performance of LiNi0.305Mn0.33Co0.33M0.025O2 (M=Al, Y, Cr) for lithium-ion batteries
LiNi0.305Mn0.33Co0.33M0.025O2 (M=Al, Y, Cr) materials were synthesized via the sol-gel method. The structure and electrochemical properties were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and charge/discharge tests. The materials were maintained the α-NaFeO2 type layered structure and the discharge capacity was also increased by doping. The Y- and Al- doping slightly decrease the initial discharge capacity of LiNi0.33Mn0.33Co0.33O2 while the Cr-doping can increase the initial discharge capacity. The cycling performances are improved after doping. When cycled at 1.0C, about 99%, 98.6% and 97.1% of their initial capacities can be retained after 40 cycles for Y-, Al- and Cr-doped materials, respectively. Their rate capabilities are also better than that of the un-doped one. EIS measurement shows that the Y-doped electrode has the lowest resistance impedance value during cycling.
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