Self-templated formation of CuCo2O4 triple-shelled hollow microspheres for all-solid-state asymmetric supercapacitors

The triple-shelled hollow CuCo2O4 (T-CuCo2O4) microspheres were synthesized by a solvothermal/calcination method. The unique structure with a large internal void volume and porous distribution shortened the ions/electrons transport distance and strengthened the electrochemical reaction. The triple-shelled architecture buffered the volume expansion/contraction to enhance structural stability due to the reduced stress and strain during the...