摘要：Advanced energy storage technologies are widely needed to efficiently utilize renewable energies such as solar and wind energy and satisfy burgeoning clean energy needs while mitigating the environmental impact of fossil fuels[1–4].Aqueous organic redox flow batteries(AORFBs)have drawn substantial attention in this area because of their decoupled energy and power,excellent scalability,and use of highly structurally tunable organic redox active species[5].

摘要：杂原子掺杂被认为是调节电极材料电子结构以提高电容性能和循环稳定性的有效途径,采用微波辅助的方法,通过后续热处理,成功获得了具有3D花状结构的钴掺杂磷酸镍.随后,将其组装成了具有良好电化学性能的非对称超级电容器(ASC).得益于钴和镍在煅烧过程中的协同作用和结构效应,团聚的纳米颗粒逐渐转变为粒径均匀的微观花状结构.作为电极材料在电流密度为1 A·g^(−1)时,由于Ni和Co之间的协同作用增加了OH−吸附能,所制备材料的比容量达到了1214 F·g^(−1).电化学测试进一步表明,在1 A·g^(−1)下循环3000次后,电极的电容保持率达到了83.9%.以钴掺杂磷酸镍为正极、还原氧化石墨烯为负极组装的超电器件在功率密度为750 W·kg^(−1)的情况下,能量密度为26.25 Wh·kg^(−1),循环稳定性良好.这也表明所设计钴掺杂磷酸镍3D花状微结构在混合超级电容器中具有一定的应用前景.