Rational utilization of biomass waste into the new clean energy such as lithium ion battery is conducive to alleviating energy crisis and environmental protection. Herein, using peanut shell as the carbon source, MnO/C composite material was successfully prepared through an eco‐environmental and facile approach based on hydrothermal treatment and pyrolysis. The resultant MnO/C composite material demonstrated hierarchical porous structure and MnO particles with irregular morphology were embedded in the pores. When used in lithium‐ion battery, the material exhibited much better lithium‐storage property than that for pristine MnO and peanut shell‐derived carbon. In 0.0‐3.0 V, the composite material can supply an initial specific capacity of 1169.5 mA h g‐1, with a capacity retention ratio of 84.9% after 200 electrochemical cycles. Even at 2400 mA g‐1, the material can still offer a discharge capacity of 532.3 mA h g‐1, manifesting the outstanding rate performance. The above enhanced lithium‐storage property of the composite material is contributed to the support of the porous carbon matrix derived from peanut shell, which is not only conducive to improve conductivity but also capable of buffering the volume expansion/shrinkage caused by lithiation/delithiation during charge/discharge process.

中文翻译：

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用花生壳构建具有高储锂性能的多孔MnO / C复合材料

将生物质废弃物合理利用到锂离子电池等新的清洁能源中，有利于缓解能源危机和环境保护。在此，以花生壳为碳源，在水热处理和热解的基础上，通过生态，环保的方法成功地制备了MnO / C复合材料。所得的MnO / C复合材料表现出分层的多孔结构，且具有不规则形态的MnO颗粒嵌入孔中。当用于锂离子电池时，该材料的锂存储性能比原始MnO和花生壳衍生的碳要好得多。在0.0-3.0 V的电压下，复合材料可提供1169.5 mA hg-1的初始比容量，在200个电化学循环后，容量保持率为84.9％。即使在2400 mA g-1下，该材料仍可提供532.3 mA hg-1的放电容量，表现出出色的倍率性能。复合材料的上述增强的锂存储性能有助于支撑源自花生壳的多孔碳基质，这不仅有利于提高导电性，而且还能够缓冲由锂化/脱锂引起的体积膨胀/收缩充电/放电过程。