摘要
通过丝网印刷方法,在由LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)、导电添加剂和聚偏氟乙烯制成的电极表面涂覆了一层薄薄的氧化石墨烯。在充电截止电压为4.3 V的条件下进行了循环性能和倍率性能测试。结果表明:未改性电极在恒电流充放电测试中容量下降且极化增加,而包覆改性后电极的容量衰减程度和极化增加速度降低。这是由于氧化石墨烯涂层抑制了LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)电极和电解质之间的部分副反应,使得改性电极的循环稳定性和倍率性能显著提高,为提升LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)电极性能提供了一种环境友好且非常有效的方法。
Electrodes consisting of LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2),aluminum foil,conductive additives,and polyvinylidene fluoride were coated with a thin graphene oxide layer via a simple screen-printing method.The cycle performance and rate capability were tested at a cutoff voltage of 4.3 V.Results show that the capacity deceases whereas the polarization increases during the galvanostatic chargedischarge tests for primary electrodes.For the graphene-oxide-modified electrodes,the capacity decrement reduces and polarization increment rate evidently slows down.As a result,the cycle stability and rate capability are improved because the graphene oxide coating suppresses the side reactions between the LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)electrodes and electrolyte.The research provides an ecofriendly and highly effective strategy to improve the performance of LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)electrodes.
作者
张文龙
王影
王东征
鲁春驰
严晓
黄碧雄
Zhang Wenlong;Wang Ying;Wang Dongzheng;Lu Chunchi;Yan Xiao;HuangBixiong(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China;Jiangsu Laboratory of Lake Environment Remote Sensing Technologies,Huaiyin Institute of Technology,Huaian 223003,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2021年第9期3144-3148,共5页
Rare Metal Materials and Engineering
基金
National Natural Science Foundation of China (51705306)
Shanghai Municipal Science and Technology Commission Project (15110501100)
Open Fund of Jiangsu Laboratory of Lake Environment Remote Sensing Technologies of Huaiyin Institute of Technology (JSLERS-2019-003)
