Transition metal borides have shown great promise as a supercapacitor electrode material. However, the amorphous structure of metal borides leads to the structural collapse of electrode material during electrochemical cycling, which seriously affects the stability of the material. In the present work, we successfully construct amorphous/crystalline NiCoB@NiCo₂S₄ heterogeneous interfacial composites by introducing the outer layer of sulfide to improve the electrochemical performance. NiCoB@NiCo₂S₄ shows a specific capacitance of 1562 F g⁻¹ at a current density of 1 A g⁻¹ and still possesses 58% specific capacitance even at a higher current density of 50 A g⁻¹. The asymmetric supercapacitor (ASC) device assembled with Bi₂O₃@C as the negative electrode and NiCoB@NiCo₂S₄ as the positive exhibits a high energy density of 98.75 Wh kg⁻¹ at a power density of 750 W kg⁻¹. The ASC also exhibits excellent cycling stability with capacitance retention of 118% after 10000 cycles at a current density of 10 A g⁻¹, which fully demonstrates the practical applications value of NiCoB@NiCo₂S₄//Bi₂O₃@C.

过渡金属硼化物作为超级电容器电极材料显示出巨大的前景。然而，金属硼化物的非晶结构导致电极材料在电化学循环过程中发生结构塌陷，严重影响材料的稳定性。在目前的工作中，我们通过引入外层硫化物来改善电化学性能，成功构建了非晶/晶态NiCoB@NiCo ₂ S _{4异质界面复合材料。}NiCoB@NiCo ₂ S _{4在1 A g} ^-1 的电流密度下表现出1562 F g ^-1的比电容，并且即使在50 A g ^-1的更高电流密度下仍具有58%的比电容。_{以Bi 2} O ₃ @C为负极、NiCoB@NiCo ₂ S ₄为正极组装的非对称超级电容器(ASC)器件在750 W kg ⁻¹ 的功率密度下表现出98.75 Wh kg ⁻¹的高能量密度。ASC还表现出优异的循环稳定性，在10 A g ^{-1的电流密度下循环10000次后电容保持率为118%，充分体现了NiCoB@NiCo} ₂ S ₄ //Bi ₂ O ₃ @C的实际应用价值。