Cu Single-Atom Modified βγ-MnO₂ Electrode

High energy density, low cost

Integrating mixed-phase synergy and single-atom engineering to overcome kinetic limitations of MnO₂-based supercapacitors, offering a low-cost high-performance solution for energy storage.

Lu, Qingjie · Wang, Xiaoqu · Zhou, Tong · Zi, Baoye · Li, Bo · Sun, Huachuan · Chen, Mingpeng · Yumin, Zhang · Zhang, Jin · Zhu, Zhongqi · Liu, Qingju

Applied Catalysis B: Environmental 2026

Specifications

Maximum energy density

{'zh': '91.34', 'en': '91.34'} Wh kg⁻¹

Advantages

Record energy density

The assembled asymmetric device achieves a maximum energy density of 91.34 Wh kg⁻¹, far exceeding that of conventional MnO₂-based supercapacitors.

Kinetics limitation overcome

Enhanced orbital hybridization, charge accumulation at mixed-phase interfaces, and electron transfer between Cu/Mn synergistically optimize the electronic structure to weaken kinetics limitation.

Highly dispersed single atoms

Uniform loading of Cu single atoms is achieved through an intrinsic vacancy anchoring strategy, maximizing atom utilization.

Cost-effective

Retaining the merits of MnO₂ including cost-effectiveness and straightforward synthesis, combined with high performance for practical applications.

Applications

• Supercapacitors：Serve as positive electrodes in asymmetric supercapacitors to boost energy density.
• Energy storage devices：Offer a low-cost, high-performance electrode alternative for energy storage devices.
• Battery management systems：Enable applications in demanding storage scenarios, simplifying management via superior device performance.
• Flexible energy storage：Powder or electrode sheets can be integrated into flexible substrates for flexible energy storage devices.