Interfacial Mo‐S‐C Bond with High Reversibility for Advanced Alkali‐Ion Capacitors: Strategies for High‐Throughput Production

Abstract The high‐throughput scalable production of low‐cost and high‐performance electrode materials that work well under high power densities required in industrial application is full of challenges for the large‐scale implementation of electrochemical technologies. Here, motivated by theoretical calculation that Mo‐S‐C heterojunction and sulfur vacancies can reduce the energy band gap, decrease the migration energy barrier, and improve the mechanical stability of MoS₂, the scalable preparation of inexpensive MoS_2‐x@CN is contrived by employing natural molybdenite as precursor, which is characteristic of high efficiency in synthesis process and energy conservation and the calculated costs are four orders of magnitude lower than MoS₂/C in previous work. More importantly, MoS_2‐x@CN electrode is endowed with impressive rate capability even at 5 A g⁻¹, and ultrastable cycling stability during almost 5000 cycles, which far outperform chemosynthesis MoS₂ materials. Obtaining the full SIC cell assembled by MoS_2‐x@CN anode and carbon cathode, the energy/power output is high up to 265.3 W h kg⁻¹ at 250 W kg⁻¹. These advantages indicate the huge potentials of the designed MoS_2‐x@CN and of mineral‐based cost‐effective and abundant resources as anode materials in high‐performance AICs.