摘要
采用高温热处理法制备了LiNi_(0.9)Co_(0.08)Al_(0.02)O_(2)正极材料,研究了预煅烧温度对材料形貌结构和电化学性能的影响。结果表明:材料在经过400℃预煅烧后,具有最佳的形貌结构和电化学性能。其中,在经过预煅烧400℃氧化后材料的电化学性能有了很大的提升,在0.1C下的可逆比容量达到213mAh/g,在5C下循环100圈后比容量仍可以达到93mAh/g,具有良好的速率性能。
LiNi_(0.9)Co_(0.08)Al_(0.02)O_(2)cathode materials were prepared by high-temperature heat treatment.The effects of different precalcination temperatures on the morphology and electrochemical performance of the materials were studied.The results shown:the materials had the best morphology,structure and electrochemical performance after being precalcined at 400℃.Among them,the electrochemical performance of the materials optimized after precalcination at 400℃were greatly improved.The reversible specific capacity at 0.1Ccan reach 213mAh/g,and the specific capacity can still reach 93mAh/g after 100cycles at 5C,the materials had good rate performance.
作者
黄会星
许云华
王娟
Huang Huixing;Xu Yunhua;Wang Juan(Shaanxi Provincial Key Laboratory of Nanomaterials and Technology,Xi'an 710048;Xi'an Hydrogen Energy Key Laboratory,Xi'an 710048)
出处
《化工新型材料》
CAS
CSCD
北大核心
2022年第6期168-171,共4页
New Chemical Materials
基金
国家自然科学基金(212174和51202179)
陕西省教育厅科学基金资助项目(12JS060、18JS058和17JS076)
陕西省教育厅自然科学基金资助项目(51305506)
陕西省自然科学基金面上项目(2020JM-481)
榆林市产学研合作项目(2019-172)
陕西省教育厅重点实验室科研计划项目(I8JS060)。
关键词
三元正极材料
前驱体预处理
形貌测试
电化学性能
ternary cathode material
precursor pretreatment
morphology test
electrochemical performance
