Electroactive materials, with high electrochemical activity, are urgently needed for supercapacitors. While it remains a great challenge to integrate high rate capability and outstanding cycling stability simultaneously. Mixed transition metal fluorides with porous structures are regarded as helpful active electrode materials for supercapacitors. Herein, three dimensional porous tri metallic (Ni–Co–M, M = Mn, Fe, Cu, Zn) fluorides were synthesized by reflux condensation and calcination methods. Among them, Ni–Co–Zn fluorides (NCZF) exhibited stronger synergetic electrochemical property compared with other transition metals, contributing a high specific capacitance of 914.4 F/g at 1 A/g and 81.3% capacity retention at 20 A/g and the specific capacitance could maintain 45.6% after 30,000 cycles. The hybrid supercapacitor based on NCZF and activated carbon (AC) electrodes also displayed a specific capacity of 222 F/g at 1 A/g and 90.2 F/g at 20 A/g with ultralong cycling stability (61.9% capacity retention after 10,000 cycles).

超级电容器迫切需要具有高电化学活性的电活性材料。同时集成高速率能力和出色的循环稳定性仍然是一个巨大的挑战。具有多孔结构的混合过渡金属氟化物被认为是用于超级电容器的有用的活性电极材料。在此，通过回流冷凝和煅烧方法合成了三维多孔三金属氟化物（Ni–Co–M，M = Mn，Fe，Cu，Zn）。其中，Ni-Co-Zn氟化物（NCZF）与其他过渡金属相比，表现出更强的协同电化学性能，在1 A / g时具有914.4 F / g的高比电容，在20 A / g时具有81.3％的容量保持率。 30,000次循环后，比电容可保持45.6％。