Self-assembled hierarchical porous NiMn2O4 microspheres as high performance Li-ion battery anodes†,RSC Advances

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Self-assembled hierarchical porous NiMn2O4 microspheres as high performance Li-ion battery anodes†
RSC Advances ( IF 3.9 ) Pub Date : 2018-12-13 00:00:00 , DOI: 10.1039/c8ra08080a
Shuang Zhao ₁ , Honglei Li ₁ , Zhixu Jian ₁ , Yalan Xing ₁ , Shichao Zhang ₁

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Hierarchical structured porous NiMn₂O₄ microspheres assembled with nanorods are synthesized through a simple hydrothermal method followed by calcination in air. As anode materials for lithium ion batteries (LIBs), the NiMn₂O₄ microspheres exhibit a high specific capacity. The initial discharge capacity is 1126 mA h g⁻¹. After 1000 cycles, the NiMn₂O₄ demonstrates a reversible capacity of 900 mA h g⁻¹ at a current density of 500 mA g⁻¹. In particular, the porous NiMn₂O₄ microspheres still could deliver a remarkable discharge capacity of 490 mA h g⁻¹ even at a high current density of 2 A g⁻¹, indicating their potential application in Li-ion batteries. This excellent electrochemical performance is ascribed to the unique hierarchical porous structure which can provide sufficient contact for the transfer of Li⁺ ion and area for the volume change of the electrolyte leading to enhanced Li⁺ mobility.

中文翻译：

自组装分级多孔 NiMn2O4 微球作为高性能锂离子电池负极†

通过简单的水热法，然后在空气中煅烧，合成了由纳米棒组装而成的分层结构的多孔 NiMn ₂ O _4微球。作为锂离子电池（LIB）的负极材料，NiMn ₂ O ₄微球表现出高比容量。初始放电容量为1126 mA hg ^-1。在 1000 次循环后，NiMn ₂ O ₄在 500 mA g ^-1的电流密度下表现出 900 mA hg ^-1的可逆容量。特别是多孔NiMn ₂ O ₄微球仍然可以提供490 mA hg的显着放电容量^-1即使在 2 A g^-1的高电流密度下，也表明它们在锂离子电池中的潜在应用。这种优异的电化学性能归因于独特的分层多孔结构，它可以为锂离子的转移提供足够的接触，^并为电解质的体积变化提供足够的面积，从而提高锂离子的^迁移率。

更新日期：2018-12-13

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