不同nLi/nM值制备富锂锰基正极材料及其电化学性能

材料导报

2019, Vol. 33

Issue (z1): 50-52

无机非金属及其复合材料

不同nLi/n_M值制备富锂锰基正极材料及其电化学性能

封平净¹, 卢鹏¹, 刘耀春¹, 何玉林²

1 淮安新能源材料技术研究院储能材料实验室,淮安 223005
2 江苏财经职业技术学院机械电子与信息工程学院,淮安 223003

Synthesis and Electrochemical Properties of Li-rich Mn-based Cathode Materials with Different nLi/nM Ratios

FENG Pingjing¹, LU Peng¹, LIU Yaochun¹, HE Yulin²

1 Energy Storage Material Laboratory, Huai’an Technology Institute of Advanced Energy Materials, Huai’an 223005
2 College of Mechanical Electronics and Information Engineering, Jiangsu Vocational College of Finance and Economics, Huai’an 223003

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摘要以NiSO₄·6H₂O、CoSO₄·7H₂O、MnSO₄·H₂O为原料,碳酸钠为沉淀剂,合成球形富锂前驱体,分别以1.00、1.01、1.02、1.03、1.04、1.05和1.06的锂元素与金属元素的化学计量比nLi/n_M(锂元素与过渡金属总物质的量比,其中M为Ni、Co、Mn)值混锂,与碳酸锂混合烧结后,制备了不同nLi/n_M值的富锂锰基正极材料Li_1.5Ni_0.25Mn_0.65Co_0.1O_2.5。电化学性能测试结果表明:nLi/n_M值为1.05的富锂正极材料的电化学性能优异,循环性能较好,在2.0~4.8 V电压窗口下,0.1C倍率首次放电比容量为276 mAh/g,1C倍率下200圈循环后的容量保持率为83.7%。

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关键词: 锂离子电池 nLi/n_M值富锂锰基正极材料电化学性能

Abstract: Spherical Li-rich precursors were synthesized with NiSO₄·6H₂O, CoSO₄·7H₂O, and MnSO₄·H₂O as raw material and Na₂CO₃ as precipitant, the Li_1.5Ni_0.25Mn_0.65Co_0.1O_2.5 Li-rich Mn-based cathode material was prepared by 1.00, 1.01, 1.02, 1.03, 1.04, 1.05 and 1.06 nLi/n_M ratios with Li₂CO₃. The electrochemical performance test results show that the Li-rich cathode material with the nLi/n_M ratio of 1.05 has excellent electrochemical performance and good cycle performance. Between 2.0 V and 4.8 V, the first discharge capacity at 0.1C rate is 276 mAh/g, and the capacity retention rate after 200 cycles at 1.0C rate is 83.7%.

Key words: lithium ion battery nLi/n_M ratios Li-rich Mn-based cathode material electrochemical performance

出版日期: 2019-05-25 发布日期: 2019-07-05

ZTFLH:

O614.111

基金资助: 江苏省自然科学基金青年基金项目(BK20170456)

作者简介: 封平净,厦门大学材料工程专业硕士研究生,在校期间主要研究方向是阳极析氧反应电催化剂;现任淮安新能源材料技术研究院材料工程师,主要研究方向是富锂正极材料。参与了多项自然科学基金项目和校企合作项目。在国内外学术期刊发表论文5篇,其中4篇被SCI收录;申请发明专利3件。卢鹏,常州大学材料物理与化学专业硕士研究生,现任淮安新能源材料技术研究院材料工程师,研究方向为储能材料与器件。主要参与了国家自然科学基金、江苏省自然科学基金、湖南省自然科学基金、淮安市重点研发计划等项目。累计发表论文7篇,其中SCI收录6篇;申请专利11件,授权1件;曾获“2016年硕士研究生国家奖学金”。lupeng@thu-aem.org.cn

引用本文:

封平净, 卢鹏, 刘耀春, 何玉林. 不同nLi/n_M值制备富锂锰基正极材料及其电化学性能[J]. 材料导报, 2019, 33(z1): 50-52.
FENG Pingjing, LU Peng, LIU Yaochun, HE Yulin. Synthesis and Electrochemical Properties of Li-rich Mn-based Cathode Materials with Different nLi/nM Ratios. Materials Reports, 2019, 33(z1): 50-52.

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http://www.mater-rep.com/CN/ 或 http://www.mater-rep.com/CN/Y2019/V33/Iz1/50

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