Carbon based manganese oxide (MnO2, MnO2/MWCNT and MnO2/rGO) composite electrodes for high-stability Li-ion batteries

IF 5.5 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY Carbon Letters Pub Date : 2023-09-23 DOI:10.1007/s42823-023-00604-1

Pitcheri Rosaiah, Ponnusamy Divya, Sangaraju Sambasivam, Ammar M. Tighezza, V. Kalaivani, A. Muthukrishnaraj, Manikandan Ayyar, Theophile Niyitanga, Haekyoung Kim

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Abstract

Synthesis of extremely competent materials is of great interest in addressing the energy storage concerns. Manganese oxide nanowires (MnO₂ NWs) are prepared in situ with multiwall carbon nanotubes (MWCNT) and graphene oxide (GO) using a simple and effective hydrothermal method. Powder XRD, Raman and XPS analysis are utilized to examine the structural characteristics and chemical state of composites. The initial specific discharge capacity of pure MnO₂ NWs_, MnO₂ NWs/MWCNT and MnO₂ NWs/rGO composites are 1225, 1589 and 1685 mAh/g, respectively. The MnO₂ NWs/MWCNT and MnO₂ NWs/rGO composites showed stable behavior with a specific capacity of 957 and 1108 mAh/g, respectively, after 60 cycles. Moreover, MnO₂ NWs/rGO composite sustained a specific capacity of 784 mAh/g, even after 250 cycles at a current density of 1 A/g showing outstanding cycling stability.

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用于高稳定性锂离子电池的碳基氧化锰（MnO2、MnO2/MWCNT 和 MnO2/rGO）复合电极

合成能力极强的材料对于解决能量存储问题具有重大意义。本研究采用简单有效的水热法，将氧化锰纳米线（MnO2 NWs）与多壁碳纳米管（MWCNT）和氧化石墨烯（GO）原位制备。利用粉末 XRD、拉曼和 XPS 分析来研究复合材料的结构特征和化学状态。纯 MnO2 NWs、MnO2 NWs/MWCNT 和 MnO2 NWs/rGO 复合材料的初始比放电容量分别为 1225、1589 和 1685 mAh/g。MnO2 NWs/MWCNT 和 MnO2 NWs/rGO 复合材料表现出稳定的特性，60 个循环后的比容量分别为 957 和 1108 mAh/g。此外，MnO2 NWs/rGO 复合材料在电流密度为 1 A/g 的条件下循环 250 次后，比容量仍保持在 784 mAh/g 的水平，显示出出色的循环稳定性。

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来源期刊

Carbon Letters CHEMISTRY, MULTIDISCIPLINARY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

7.30

自引率

20.00%

发文量

118

期刊介绍： Carbon Letters aims to be a comprehensive journal with complete coverage of carbon materials and carbon-rich molecules. These materials range from, but are not limited to, diamond and graphite through chars, semicokes, mesophase substances, carbon fibers, carbon nanotubes, graphenes, carbon blacks, activated carbons, pyrolytic carbons, glass-like carbons, etc. Papers on the secondary production of new carbon and composite materials from the above mentioned various carbons are within the scope of the journal. Papers on organic substances, including coals, will be considered only if the research has close relation to the resulting carbon materials. Carbon Letters also seeks to keep abreast of new developments in their specialist fields and to unite in finding alternative energy solutions to current issues such as the greenhouse effect and the depletion of the ozone layer. The renewable energy basics, energy storage and conversion, solar energy, wind energy, water energy, nuclear energy, biomass energy, hydrogen production technology, and other clean energy technologies are also within the scope of the journal. Carbon Letters invites original reports of fundamental research in all branches of the theory and practice of carbon science and technology.