MoS 2 @Polyaniline for Aqueous Ammonium‐Ion Supercapacitors

Abstract Ammonium‐ion aqueous supercapacitors are raising notable attention owing to their cost, safety, and environmental advantages, but the development of optimized electrode materials for ammonium‐ion storage still lacks behind expectations. To overcome current challenges, here, a sulfide‐based composite electrode based on MoS 2 and polyaniline (MoS 2 @PANI) is proposed as an ammonium‐ion host. The optimized composite possesses specific capacitances above 450 F g −1 at 1 A g −1 , and 86.3% capacitance retention after 5000 cycles in a three‐electrode configuration. PANI not only contributes to the electrochemical performance but also plays a key role in defining the final MoS 2 architecture. Symmetric…

• NN
  National Natural Science Foundation of China

  Awards: 52033008, 52273275, YDZX20193502000004
• CS
  China Scholarship Council

  Award: 202206310046‐DAI JUGUO