Preparation and electrochemical performance of nitrogen-doped carbon-coated Bi2Mn4O10 anode materials for lithium-ion batteries |
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| Affiliation: | 1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;2. National Engineering Laboratory for High Efficiency Recovery of Refractory Nonferrous Metals Resources, Central South University, Changsha 410083, China;1. Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology, and Department of Electronics, College of Electronic Information and Optical Engineering, Nankai University, Tianjin 300350, PR China;2. School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, PR China;1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;2. National Engineering Laboratory for High Efficiency Recovery of Refractory Nonferrous Metals Resources, Changsha 410083, China |
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| Abstract: | To inhibit rapid capacity attenuation of Bi2Mn4O10 anode material in high-energy lithium-ion batteries, a novel high-purity anode composite material Bi2Mn4O10/ECP-N (ECP-N: N-doped Ketjen black) was prepared via an uncomplicated ball milling method. The as-synthesized Bi2Mn4O10/ECP-N composite demonstrated a great reversible specific capacity of 576.2 mA·h/g after 100 cycles at 0.2C with a large capacity retention of 75%. However, the capacity retention of individual Bi2Mn4O10 was only 27%. Even at 3C, a superior rate capacity of 236.1 mA·h/g was retained. Those remarkable electrochemical performances could give the credit to the introduction of ECP-N, which not only effectively improves the specific surface area to buffer volume expansion and enhances conductivity and wettability of composites but also accelerates the ion transfer and the reversible conversion reaction. |
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| Keywords: | N-doped Ketjen black rate capability lithium-ion batteries |
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