Molybdenum disulfide (MoS) is touted as a highly promising material for fiber-shaped supercapacitors (FSCs) but limited by its low capacitance and unsatisfactory cycling stability. Here, we report a MoS deposited stainless steel wire (MoS@SSW) that can be electrochemically intercalated with dual ions (Na and H). A high capacitance of ∼1632.7 mF cm at 0.4 mA cm and high capacitance retention of 84.25 % after 10,000 cycles under sulfuric acid/sodium sulfate (HSO/NaSO) aqueous electrolyte is recorded for this system. This is mainly attributed to the pre-intercalation of H into MoS to form MoS-SH. This process redistributes the local charge regions on MoS surface and lowers the energy barrier for Na migration in MoS to facilitate the adsorption and intercalation of Na. Notably, MoS@SSW FSCs are integrated into three-dimensional space textiles as a proof-of-concept. This novel exploration of the nanointerface resulted by electrolyte engineering offers a feasible design paradigm for the development of high-performing FSCs.
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| http://dx.doi.org/10.1016/j.jcis.2025.02.157 | DOI Listing |
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