摘要
从储能器件应用前景来看,正负两极使用同一前驱体来制备可以简化工艺过程,显著降低储能器件的成本.在本论文中,我们由单一前驱体——石油焦来制备活性材料并将其组装成了双碳基锂离子电容器.对于负极,通过简单的球磨和碳化工艺制备了石油焦衍生碳(PCC样品),该碳材料具有较大的压实密度(1.80 g cm^(-3))和高电导率(11.5 S cm^(-1)).对于正极,前驱体经氢氧化钾活化(PC-AC样品),获得了良好的孔隙结构,以满足快速电容行为.结果表明,在宽电压窗口下,组装的双碳基锂离子电容器具有良好的结构稳定性,高能量密度(231 W h kg^(-1)/206 W h L^(-1))和超长循环寿命(高达10,000次循环).石油焦衍生的碳材料具有良好的电化学响应性和简单的生产工艺,因而实际应用潜力巨大.
Using the same materials for the cathode and anode in energy storage devices could greatly simplify the technological process and reduce the device cost significantly.In this paper,we assemble a dual carbon-based Li-ion capacitor with the active materials derived entirely from a single precursor,petroleum coke.For the anode,petroleum cokederived carbon(PCC)is prepared by simple ball milling and carbonization,having a massive tap density(1.80 g cm^(-3))and high electrical conductivity(11.5 S cm^(-1)).For the cathode,the raw petroleum coke is activated by KOH(petroleum cokeactivated carbon(PC-AC)sample)to achieve a well-developed pore structure to meet a rapid capacitive behavior.As a result,in addition to the robust structural stability of both the anode and cathode,the assembled dual carbon Li-ion capacitor shows a high energy density(231 W h kg^(-1)/206 W h L^(-1))and ultralong cycling life(up to 3000/10,000 cycles)at a wide voltage window.The excellent electrochemical response and simple production process make the PCC materials have great potential for practical application.
作者
邱智健
崔永朋
王丹丹
王业胜
胡浩宇
李学进
蔡同辉
高秀丽
胡涵
吴明铂
薛庆忠
阎子峰
邢伟
Zhijian Qiu;Yongpeng Cui;Dandan Wang;Yesheng Wang;Haoyu Hu;Xuejin Li;Tonghui Cai;Xiuli Gao;Han Hu;Mingbo Wu;Qingzhong Xue;Zifeng Yan;Wei Xing(State Key Laboratory of Heavy Oil Processing,School of Material Science and Engineering,College of Science,China University of Petroleum,Qingdao 266580,China)
基金
financially supported by the Natural Science Foundation of Shandong Province(ZR2020MB078 and ZR2021QB085)
the National Natural Science Foundation of China(51877216 and 22109178)
Taishan Scholar Foundation(tsqn20161017)
China Postdoctoral Science Foundation(2021M693498)
the Postdoctoral Innovative Talent Support Program of Shandong Province(SDBX2021005)
the Postdoctoral Innovation Project of Shandong Province(202101009)
the Postdoctoral Applied Research Program of Qingdao(qdyy20200071)
the Fundamental Research Funds for the Central Universities(19CX05001A,19CX05002A,and 20CX06101A)
the Research Project of State Key Laboratory for Heavy Oil Processing(SLK-ZZKT-2021)。