Interface Engineering of Biomass-Derived Carbon used as Ultrahigh-Energy-Density and Practical Mass-Loading Supercapacitor Electrodes
Interface Engineering of Biomass-Derived Carbon used as Ultrahigh-Energy-Density and Practical Mass-Loading Supercapacitor Electrodes
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超高能量密度实用大容量超级电容器电极用生物质碳的界面工程
DOI：
10.1002/adfm.202212078
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发表时间：
2022-12-16
影响因子：
19
通讯作者：
Wang, Xiaohui
中科院分区：
文献类型：
--
作者：
Chen, Ruwei;Tang, Hao;Wang, Xiaohui
开发具有高质量负载和高效电子/离子传输的柔性电极具有重要意义，但创新适合高能量密度应用的电极结构仍然是一个挑战。本文首次通过牺牲模板法在界面工程纤维素纺织品中原位形成木质素磺酸衍生的N/ s共掺杂石墨烯样碳。实验和理论计算都表明，形成的石榴状结构具有连续的导电途径和多孔特性，允许充分的离子/电子在整个结构中传输。因此，所获得的柔性电极提供了6534 mF cm(-2) （335.1 F g(-1)）的显着集成电容，并且在工业适用的质量负载为19.5 mg cm（-2）时具有优异的稳定性。基于相同的电极结构工程，还可以获得具有7000 mF cm（-2）超高电容的假电容阴极。组装后的非对称超级电容器实现了3625 mF cm（-2）的高面电容，最大能量密度为1.06 mWh cm(-2)，优于大多数其他高负载超级电容器。这种合成方法和结构工程策略可以为超级电容器以外的储能领域提供材料设计概念和广泛的应用。
The development of flexible electrodes with high mass loading and efficient electron/ion transport is of great significance but still remains the challenge of innovating suitable electrode structures for high energy density application. Herein, for the first time, lignosulfonate-derived N/S-co-doped graphene-like carbon is in situ formed within an interface engineered cellulose textile through a sacrificial template method. Both experimental and theoretical calculations disclose that the formed pomegranate-like structure with continuous conductive pathways and porous characteristics allows sufficient ion/electron transport throughout the entire structures. As a result, the obtained flexible electrode delivers a remarkable integrated capacitance of 6534 mF cm(-2) (335.1 F g(-1)) and a superior stability at an industrially applicable mass loading of 19.5 mg cm(-2). A pseudocapacitive cathode with ultrahigh capacitance of 7000 mF cm(-2) can also be obtained based on the same electrode structure engineering. The as-assembled asymmetric supercapacitor achieves a high areal capacitance of 3625 mF cm(-2), and a maximum energy density of 1.06 mWh cm(-2), outperforms most of other reported high-loading supercapacitors. This synthesis method and structural engineering strategy can provide materials design concepts and a wide range of applications in the fields of energy storage beyond supercapacitors.