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Nitrogen-Doped Carbon Networks with Consecutive Conductive Pathways from a Facile Competitive Carbonization-Etching Strategy for High-Performance Energy Storage
Small ( IF 13.0 ) Pub Date : 2021-10-22 , DOI: 10.1002/smll.202104375 Siliang Liu 1, 2 , Zhe Zhao 2, 3 , Li Jin 4 , Jing Sun 5 , Chenlu Jiao 1 , Qin Wang 5
Small ( IF 13.0 ) Pub Date : 2021-10-22 , DOI: 10.1002/smll.202104375 Siliang Liu 1, 2 , Zhe Zhao 2, 3 , Li Jin 4 , Jing Sun 5 , Chenlu Jiao 1 , Qin Wang 5
Affiliation
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Recently, new carbonization strategies for synthesizing structure-controlled and high-performance carbon electrode materials have attracted great attentions in the field of energy storage and conversion. Here a competitive carbonization-etching strategy to prepare nitrogen-doped carbon polyhedron@carbon nanosheet (NCP@CNS) hybrids derived from zeolitic imidazolate framework-8 is presented. Consecutive conductive networks are constructed in the NCP@CNS hybrids during a unique carbonization-etching pyrolysis, where a competition between the formation of NCPs and CNSs exists. When the NCP@CNS hybrids are employed as supercapacitor electrodes, their hierarchically porous NCPs serve as ion-buffering reservoirs for offering fast ion transport channels, and the CNSs within hybrids not only link the NCPs together to build electron transfer pathways but also restrict the volume fluctuation of electrodes during charging and discharging process. As a result, the as-fabricated NCP@CNS electrode displays excellent electrochemical performances including a superior specific capacitance of 320 F g−1, a high energy density of 22.2 W h kg−1 (5.6 W h kg−1 for symmetric device), and a long cycle life with capacitance retention of ≈101.8% after 5000 cycles. This study opens an encouraging avenue toward the tailored synthesis of metal-organic frameworks (MOFs)-derived carbon electrodes for renewable energy storage applications and devices.
中文翻译：
具有连续导电通路的氮掺杂碳网络，来自用于高性能储能的简单竞争性碳化蚀刻策略
近年来，用于合成结构可控的高性能碳电极材料的新型碳化策略在储能和转换领域引起了广泛关注。本文介绍了一种竞争性碳化蚀刻策略，用于制备源自沸石咪唑酯骨架 8 的氮掺杂碳多面体@碳纳米片 (NCP@CNS) 杂化物。在独特的碳化-蚀刻热解过程中，NCP@CNS 杂化物中构建了连续的导电网络，其中 NCP 和 CNS 的形成之间存在竞争。当 NCP@CNS 杂化物用作超级电容器电极时，它们的分层多孔 NCP 可用作离子缓冲库，以提供快速离子传输通道，并且混合动力车内的CNSs不仅将NCPs连接在一起以建立电子传递途径，而且还限制了充电和放电过程中电极的体积波动。因此，制备的 NCP@CNS 电极显示出优异的电化学性能，包括 320 F g 的优异比电容-1，22.2 W h kg -1的高能量密度（对称器件为5.6 W h kg -1）和长循环寿命，5000次循环后电容保持率≈101.8%。这项研究为定制合成用于可再生能源存储应用和设备的金属有机框架（MOF）衍生的碳电极开辟了一条令人鼓舞的途径。
更新日期：2021-10-22
中文翻译：
具有连续导电通路的氮掺杂碳网络，来自用于高性能储能的简单竞争性碳化蚀刻策略
近年来，用于合成结构可控的高性能碳电极材料的新型碳化策略在储能和转换领域引起了广泛关注。本文介绍了一种竞争性碳化蚀刻策略，用于制备源自沸石咪唑酯骨架 8 的氮掺杂碳多面体@碳纳米片 (NCP@CNS) 杂化物。在独特的碳化-蚀刻热解过程中，NCP@CNS 杂化物中构建了连续的导电网络，其中 NCP 和 CNS 的形成之间存在竞争。当 NCP@CNS 杂化物用作超级电容器电极时，它们的分层多孔 NCP 可用作离子缓冲库，以提供快速离子传输通道，并且混合动力车内的CNSs不仅将NCPs连接在一起以建立电子传递途径，而且还限制了充电和放电过程中电极的体积波动。因此，制备的 NCP@CNS 电极显示出优异的电化学性能，包括 320 F g 的优异比电容-1，22.2 W h kg -1的高能量密度（对称器件为5.6 W h kg -1）和长循环寿命，5000次循环后电容保持率≈101.8%。这项研究为定制合成用于可再生能源存储应用和设备的金属有机框架（MOF）衍生的碳电极开辟了一条令人鼓舞的途径。
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