CoSe/MoSe₂/N-GQD multi-heterojunction anode

Multi-interface BIEFs boost K⁺ storage

CoSe, MoSe₂, and N-doped graphene quantum dots form multi-heterointerfaces that generate built-in electric fields, accelerating K⁺ transport and buffering volume change for high-rate potassium-ion anodes.

Zhang, Long · Chong, Hu · Gao, Xinglong · Qu, Liu · Wenxin, Tang · Cheng, Lingli · Wu, Ming Hong · Li, Zhen

Journal of Energy Chemistry 2026

Specifications

Specific capacity

{'zh': '617.5', 'en': '617.5'} mAh g⁻¹

Specific capacity

{'zh': '175.8', 'en': '175.8'} mAh g⁻¹

Advantages

Directional charge transport

Unbalanced charge distribution at heterointerfaces induces built-in electric fields that promote directional electron transport.

Volume change buffered

Hollow carbon nanocages and N-GQDs buffer volume expansion, improving cycling stability.

Exceptional rate capability

Retains 175.8 mAh g⁻¹ at 20 A g⁻¹, suitable for fast-charging applications.

Applications

• Potassium-ion battery anode：Serves as anode to deliver high capacity and rate for fast-charging potassium-ion batteries.
• High-rate anode materials：Retains 175.8 mAh g⁻¹ at 20 A g⁻¹, enabling high-power energy storage.
• Potassium-ion hybrid capacitors：Pairs with PC cathode to build hybrid capacitors with high energy and power density.
• Transition metal selenide catalysts：Multi-heterointerfaces promote charge transfer for electrocatalysis.