工程科学学报2017，Vol.39Issue(3)：407-416,10.DOI:10.13374/j.issn2095-9389.2017.03.013
高性能锂离子电池负极材料一氧化锰/石墨烯复合材料的合成
Synthesis of MnO/reduced graphene oxide composites as high performance anode materials for Li-ion batteries
摘要
Abstract
MnO/reduced graphene oxide ( MnO/rGO) composites synthesized through freeze-drying following annealing were used as anode materials for lithium ion batteries. At 500 mA·g-1 , the MnO/rGO composite exhibits a reversible capacity as high as 830 mAh·g-1 and the specific capacitance remains at 805 mAh·g-1 after 160 discharge/charge cycles, demonstrating excellent cycling sta-bility. It also shows good rate capacities and delivers a specific capacity of 412 mAh·g-1 at 2. 0 A·g-1 after 225 cycles at different rates. The rGO increases the electrical conductivity and provides space to accommodate the volume expansion of MnO during charge/discharge. The extra capacity, over the theoretical value of MnO, is attributed to the formation of higher oxidation state manganese ac-cording to the charge-voltage derivative analysis of the galvanostatic charge- discharge curves. A higher tendency to further oxidize Mn(Ⅱ) in the MnO/rGO composite maybe result in the extra oxygen source provided by rGO during the electrode reaction. The sim-ple and green synthetic protocol and the excellent electrochemical performance demonstrate the great potential of the MnO/rGO com-posite anode in large scale production and applications.关键词
一氧化锰/石墨烯/锂离子电池/负极材料Key words
manganese monoxide/graphene/lithium ion batteries/anode materials分类
信息技术与安全科学引用本文复制引用
苗小飞,刘永川,张祥昕,陈素晶,陈远强,张易宁..高性能锂离子电池负极材料一氧化锰/石墨烯复合材料的合成[J].工程科学学报,2017,39(3):407-416,10.基金项目
国家自然科学基金青年基金项目(51602310) （51602310）
福建省科学技术资助项目(2014H2008) （2014H2008）
福建省重点引导性资助项目(2015H0052, 2016H0047) （2015H0052, 2016H0047）
