Synthesis of MnO/reduced graphene oxide composites as high performance anode materials for Li-ion batteries
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 rema...
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Science Press
2017-03-01
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| Series: | 工程科学学报 |
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| Online Access: | http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2017.03.013 |
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| author | MIAO Xiao-fei LIU Yong-chuan ZHNAG Xiang-xin CHEN Su-jing CHEN Yuan-qiang ZHANG Yi-ning |
| author_facet | MIAO Xiao-fei LIU Yong-chuan ZHNAG Xiang-xin CHEN Su-jing CHEN Yuan-qiang ZHANG Yi-ning |
| author_sort | MIAO Xiao-fei |
| collection | DOAJ |
| description | 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 stability. 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 according 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 simple and green synthetic protocol and the excellent electrochemical performance demonstrate the great potential of the MnO/rGO composite anode in large scale production and applications. |
| format | Article |
| id | doaj-art-80e1793a10b1485abebecdc0e2f38225 |
| institution | OA Journals |
| issn | 2095-9389 |
| language | zho |
| publishDate | 2017-03-01 |
| publisher | Science Press |
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| series | 工程科学学报 |
| spelling | doaj-art-80e1793a10b1485abebecdc0e2f382252025-08-20T01:47:54ZzhoScience Press工程科学学报2095-93892017-03-0139340741610.13374/j.issn2095-9389.2017.03.013Synthesis of MnO/reduced graphene oxide composites as high performance anode materials for Li-ion batteriesMIAO Xiao-fei0LIU Yong-chuan1ZHNAG Xiang-xin2CHEN Su-jing3CHEN Yuan-qiang4ZHANG Yi-ning1) Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China1) Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China1) Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China1) Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China1) Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, ChinaMnO/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 stability. 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 according 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 simple and green synthetic protocol and the excellent electrochemical performance demonstrate the great potential of the MnO/rGO composite anode in large scale production and applications.http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2017.03.013manganese monoxidegraphenelithium ion batteriesanode materials |
| spellingShingle | MIAO Xiao-fei LIU Yong-chuan ZHNAG Xiang-xin CHEN Su-jing CHEN Yuan-qiang ZHANG Yi-ning Synthesis of MnO/reduced graphene oxide composites as high performance anode materials for Li-ion batteries 工程科学学报 manganese monoxide graphene lithium ion batteries anode materials |
| title | Synthesis of MnO/reduced graphene oxide composites as high performance anode materials for Li-ion batteries |
| title_full | Synthesis of MnO/reduced graphene oxide composites as high performance anode materials for Li-ion batteries |
| title_fullStr | Synthesis of MnO/reduced graphene oxide composites as high performance anode materials for Li-ion batteries |
| title_full_unstemmed | Synthesis of MnO/reduced graphene oxide composites as high performance anode materials for Li-ion batteries |
| title_short | Synthesis of MnO/reduced graphene oxide composites as high performance anode materials for Li-ion batteries |
| title_sort | synthesis of mno reduced graphene oxide composites as high performance anode materials for li ion batteries |
| topic | manganese monoxide graphene lithium ion batteries anode materials |
| url | http://cje.ustb.edu.cn/article/doi/10.13374/j.issn2095-9389.2017.03.013 |
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