通过水热法从生物质废料玉米秸秆中制备表面光滑的碳微球(CMs),并首次将未经碳化或活化的生物质碳微球作为间隔物插入石墨烯片层中合成CMs/rGO复合水凝胶。碳微球在抑制石墨烯片层团聚的同时,可以提高材料的亲水性和表面相容性。基于此复合材料组装的无粘结剂对称型超级电容器表现出良好的双电层电容(0.3A/g时264.1F/g),出色的倍率性能(10A/g电流密度下电容保持率为81.5%),以及优秀的循环稳定性(10A/g下循环10000次,电容保持率为95.6%)。
Carbon microspheres (CMs) with smooth surface were prepared from biomass waste corn stalks via hydrothermal method,and uncarbonized or inactivated CMs were first used as spacers between graphene sheets to synthesize CMs/rGO composite hydrogels.Carbon microspheres could improve the hydrophilicity and surface compatibility of the material while inhibiting the agglomeration of graphene sheets.The binder-free symmetrical supercapacitors assembled based on CMs/rGO had good double-layer capacitance (264.1F/g at 0.3A/g),excellent rate performance (81.5% capacitance retention rate at 10A/g current density),and outstanding cycle stability (95.6% capacitance retention rate after 10000 cycles at 10A/g).
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基金资助
国家自然科学基金(52072191);黑龙江省自然科学基金(联合引导项目,LH2020E126);黑龙江省表面活性剂与工业助剂重点实验室开放课题基金资助项目(BMHXJKF002);黑龙江省优势特色学科——“植物性食品加工技术特色学科”专项项目(YSTSXK201870);黑龙江省省属高等学校基本科研业务费科研项目(135509205);齐齐哈尔大学研究生创新创业项目(YJSCX2020003)
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