LiNi0.7Co0.1Mn0.2O2@C正极材料性能的研究OA
Performance study of LiNi0.7Co0.1Mn0.2O2@C cathode material
为了改善LiNi0.7Co0.1Mn0.2O2的残锂和提高其电化学稳定性,以葡萄糖为碳源,通过湿法包覆和高温煅烧的方法进行碳包覆改性,制得LiNi0.7Co0.1Mn0.2O2@C材料.利用X射线衍射和扫描电子显微镜对样品结构进行表征,并组装成扣式电池对其进行电化学性能测试.研究表明:包覆的碳层能有效降低表面残碱,同时碳包覆能显著提升电子导电性、改善材料的电化学性能.在0.2 C、2.75～4.3 V电压下放电比容量为186.1 mAh/g,放电效率达89.0%.1 C循环80次后容量保持率为97.6%,且电荷转移阻抗较小.
To improve the residual lithium and enhance the electrochemical stability of LiNi0.7Co0.1-Mn0.2O2,glucose was used as the carbon source.A carbon-coated LiNi0.7Co0.1Mn0.2O2@C material was prepared through wet-chemical coating and high-temperature calcination.The sample was character-ized by X-ray diffraction(XRD)and scanning electron microscopy(SEM).Coin cells were assembled to test its electrochemical performance.The results show that the carbon coating effectively reduced surface residual alkali.The carbon coating not only significantly enhanced electronic conductivity but also improved overall electrochemical performance.At a current density of 0.2 C and a voltage range of 2.75-4.3 V,a discharge specific capacity of 186.1 mAh/g was achieved.The discharge efficiency reached 89.0%.After 80 cycles at 1 C,the capacity retention rate was 97.6%.A low charge transfer resistance was observed.
吴甜甜;徐宝和;李瑞锋;姜越洋;姚怡彤;江玉枫;周徐杰
黄山学院化学化工学院无机功能材料重点实验室,安徽 黄山 245000浙江帕瓦新能源股份有限公司,浙江 绍兴 312000黄山学院化学化工学院无机功能材料重点实验室,安徽 黄山 245000黄山学院化学化工学院无机功能材料重点实验室,安徽 黄山 245000黄山学院化学化工学院无机功能材料重点实验室,安徽 黄山 245000黄山学院化学化工学院无机功能材料重点实验室,安徽 黄山 245000黄山学院化学化工学院无机功能材料重点实验室,安徽 黄山 245000
信息技术与安全科学
三元正极材料碳包覆电化学性能表面残锂
ternary cathode materialsurface coated with carbonelectrochemical performancesurface residual lithium
《电源技术》 2026 (5)
824-829,6
安徽省大学生创新训练一般项目(S202410375114)国家级大学生创新训练项目(202310375018)横向项目(hxkt2025217)安徽省科技厅部级项目"国家重点实验室项目"(SKLCC2407)
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