Abstract Long and tortuous pores in granular porous carbons for supercapacitors result in inferior rate capability and low capacitance. Sheet-like porous carbons with short pore length show potential applications as supercapacitor electrode materials. Herein, wrinkled porous carbon nanosheets (WPCNSs) were prepared from methylnaphthalene oil using CaCO 3 template coupled with in-situ KOH activation strategy. The WPCNS features wrinkled sheet-like architecture with abundant short pores. The WPCNS electrode shows a high capacitance of 286 F g −1 at 0.05 A g −1 , a good rate capability of 201 F g −1 at 20 A g −1 , and an outstanding cycle stability with 98.4% initial capacitance after 7000 cycles in KOH electrolyte. This work provides a feasible method to prepare WPCNSs from aromatic liquid carbon precursors using low-cost CaCO 3 as template for high-performance supercapacitors.

中文翻译：

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用于高性能超级电容器的甲基萘油褶皱多孔碳纳米片

摘要 用于超级电容器的粒状多孔碳中长而曲折的孔导致较差的倍率性能和低电容。具有短孔长的片状多孔碳显示出作为超级电容器电极材料的潜在应用。在此，使用 CaCO 3 模板结合原位 KOH 活化策略从甲基萘油中制备起皱的多孔碳纳米片 (WPCNS)。WPCNS 具有皱纹片状结构和丰富的短孔。WPCNS 电极在 0.05 A g -1 时具有 286 F g -1 的高电容，在 20 A g -1 时具有 201 F g -1 的良好倍率性能，以及出色的循环稳定性，7000 次循环后初始电容为 98.4%在 KOH 电解液中。