Electrode material for electrochemical devices

Electrode material with crack suppression via MXene coating on metal oxide surfaces

This technology involves coating exfoliated MXene onto the surface of metal oxide particles (e.g., MnFe2O4) to create a physical protective layer. This suppresses cracking and pulverization caused by the expansion and contraction of electrode active materials during charging and discharging, while also enhancing electrical conductivity.

Repeated charging and discharging of electrode active materials cause volume expansion and contraction, leading to mechanical stress that results in cracking, pulverization, and loss of electrical contact, which degrades long-term cycle stability and lifespan.

This technology produces a composite by exfoliating Ti3C2Tx MXene clusters, mixing them with hydrothermally synthesized metal oxide particles, stir-coating, and freeze-drying. This forms a 0.1–10 nm thick MXene layer on the metal oxide surface, securing mechanical strength and conductivity, which significantly contributes to the commercial competitiveness of secondary batteries.

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Key Features:

• Electrode material composed of metal oxides obtained through hydrothermal synthesis from exfoliated MXene and oxide precursors
• Electrode material for electrochemical devices containing a MXene-oxide composite formed via a stir-coating process
• Configuration where the metal oxide is formed via hydrothermal synthesis from a mixture of iron chloride and maleic acid
• Electrode material that suppresses cracking and pulverization caused by expansion and contraction by coating exfoliated MXene onto metal oxide particle surfaces

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