超级电容器
材料科学
电容
储能
原位聚合
复合材料
电容器
电极
多孔性
化学工程
纳米技术
碳纤维
可再生能源
电化学
稳健性(进化)
导电体
纳米
气凝胶
纳米复合材料
电容式探头
寄生电容
复合数
碳纳米管
活性炭
作者
Qingyang Liu,Fengjuan Wang,Yu Zhang,Shuo Dong,Zhiyong Liu,Liguo Wang,Taotao Feng,Shiyu Sui,Yuncheng Wang,Jinyang Jiang,Peng Li
标识
DOI:10.1002/advs.202515769
摘要
Abstract The rapid deployment of renewable energy demands cost‐effective and scalable energy storage solutions. While cement‐based supercapacitors offer transformative potential, their development is hindered by charge storage capacity, mechanical strength, and environmental stability. Herein, a breakthrough carbon cement supercapacitor (CCS) with exceptional electrochemical performance and excellent robustness is engineered. The porous carbon cement (CC) electrode, characterized by high strength, extremely low resistance, and high‐connectivity conductive hydrogel electrolyte, is prepared by thermomechanical consolidation at 90 °C. Through in situ polymerization around sodium dodecyl sulfate (SDS)‐mediated carbon black (CB) surfaces, a CB‐hydrogel network is built inside the multiscale pore structure of the carbon‐cement electrode. The CCS exhibits a leading areal capacitance (1708 mF cm − 2 ), over 83% capacitance retention after 10 000 cycles, high strength (>8 MPa), 92.2% capacitance retention under extreme loading conditions, a wide operating temperature range from −20 to 80 °C with less than 9% capacitance fluctuation, and incombustibility. This new device exhibits potential to revolutionize energy‐storage systems.
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