Facile synthesis of carbon-LiMnPO4 nanorods with hierarchical architecture as a cathode for high-performance Li-ion batteries

Facile synthesis of carbon-LiMnPO4 nanorods with hierarchical architecture as a cathode for high-performance Li-ion batteries
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轻松合成具有分层结构的碳-LiMnPO4纳米棒作为高性能锂离子电池的阴极

DOI:
10.1016/j.electacta.2018.09.095
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发表时间:
2018-11
影响因子:
6.6
通讯作者:
Ping He
Ping He
中科院分区:
材料科学2区
文献类型:
--
作者:
Junzhe Li;Shao-hua Luo;Qing Wang;Shengxue Yan;Jian Feng;Huan Liu;Xueyong Ding;Ping He

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LiMnPO 4由于其合适的氧化还原电位和较高的理论能量密度而引起了人们的广泛兴趣。在这里,我们提出了一种策略,将普通的LiMnPO 4转化为分散的,分层的,纳米棒状结构的真空浸渍使用阳极氧化铝模板。由于独特的分层结构,所得的碳-LiMnPO 4纳米棒具有高百分比的暴露(010)面、均匀的碳涂层和大的比表面积,非常有效地保持了作为快速充电/放电锂离子电池阴极的优点。结果表明,在0.05C和10 C下,其可逆容量分别达到156.8mAh g(-1)和91.7mAh g(-1).同时,在0.2C和1C放电速率下,其在100次循环后分别仍保持初始容量的98.2%和97.5%,显示出优异的循环稳定性。该合成策略为制备先进的锂离子电池电极材料提供了一种新的设计思路。
LiMnPO4 has attracted massive interests due to its appropriate redox potential and higher theoretical energy density. Here, we present a strategy to transform common LiMnPO4 into dispersive, hierarchical, nanorod-like structure by vacuum immersion using anodic aluminum oxide templates. Owing to the unique hierarchical configuration, the resultant carbon-LiMnPO4 nanorods having high percentage exposed (010) facets, uniform carbon coating and large specific surface area, are very effective to keep the advantages as a fast charge/discharge lithium ion battery cathode. As a consequence, the high reversibility capacity of up to 156.8 mAh g(-1) at 0.05 C and 91.7 mAh g(-1) at 10 C is achieved. Meanwhile, it still retains 98.2% and 97.5% of the initial capacity after 100 cycles at 0.2 C and 1 C discharge rate, respectively, revealing an excellent cycling stability. This synthesis strategy provides a new design idea for preparing advanced electrode materials for lithium ion batteries.
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