Bio‐Guided Synthesis of Bimetallic Organic Frameworks for Supercapacitors

ABSTRACT

The development of green and sustainable advanced energy storage materials represents an urgent demand in the energy sector. Conventional synthesis methods often struggle to simultaneously achieve both high metal content and dispersion of metal particles, while also being associated with high energy consumption and environmental pollution. To address this challenge, this study proposes a novel strategy of plant as a green factory guided synthesis, utilizing the aquatic plant Myriophyllum Aquaticum as a living reactor. By leveraging its intrinsic physiological processes, a bimetallic metal‐organic frameworks (MOFs) hybrid precursor is synthesized in situ within the stems via stepwise absorption and ion exchange, realizing a plant self‐driven synthesis of MOFs in plant. Furthermore, by exploiting the bio‐confinement effect provided by the plant's natural channels and the structural confinement inherent to the MOF, the precursor is converted through controlled pyrolysis into nitrogen‐doped carbon‐supported composites with bimetal or bimetallic compounds. When NiCo/nitrogen‐doped porous carbon is used as the negative electrode material and NiCoO _x /nitrogen‐doped porous carbon as the positive electrode material, the synthesized materials deliver high specific capacitances of 237.8 F·g ⁻¹ and 257.6 C·g ⁻¹ , respectively. Assembled into a homologous asymmetric supercapacitor, the device exhibits a high energy density of 28.78 Wh·kg ⁻¹ at a power density of 350 W·kg ⁻¹ and maintains 92% of its initial capacitance after 6000 cycles. This work not only validates the feasibility of the bio‐guided synthesis of high‐performance energy storage materials, but also provides a new pathway for the green manufacturing of energy materials, highlighting the significant application potential of this interdisciplinary approach.