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<p>Presently, substantial efforts are being made to create phase change materials (PCMs) with shape-stabilized composites to address imbalances in renewable energy storage systems. The present study focused on the synthesis of composite materials utilizing economical, readily available, and eco-friendly biochar (BCH) derived from Eucalyptus and graphene oxide (GO) via a one-step hydrothermal process. n-Dodecane, an organic liquid, was utilized as the energy storage medium. These hybrid composites offer advantageous morphology and favorable structures for phase change material having the ability of higher encapsulation and energy storage. The PCM loading capacities of BCH, BCH-GO, and GO were 50.4%, 70.6%, and 80.2%, with corresponding latent heats of 80.2, 110.3, and 130.2&#xa0;J/g, respectively. The incorporation of GO along with BCH enhanced the capacity of latent heat storage of these novel PCMs in comparison to those without GO. The unblemished BCH had a reduced PCM loading ratio and latent heat in comparison to BCH-GO and GO, likely attributable to the restricted pore volume and robust intermolecular interactions between the reactive functional groups and PCM. Concurrently, the synthesized composite phase change materials demonstrated thermal stability and chemical compatibility. This synthesis technique aims to establish a platform for producing biochar-derived multifunctional phase change materials for specific applications.</p> Graphical abstract <p></p>

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Enhanced thermal energy storage using waste biomass derived modified biochar-graphene oxide as a high-performance PCM encapsulant

  • 期刊论文

  • 发表日期：

    2026年7月13日

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  • Vivek Kumar Singh,
  • Amit Medhavi,
  • Ambuj Kumar,
  • Saras Prakash

摘要

Presently, substantial efforts are being made to create phase change materials (PCMs) with shape-stabilized composites to address imbalances in renewable energy storage systems. The present study focused on the synthesis of composite materials utilizing economical, readily available, and eco-friendly biochar (BCH) derived from Eucalyptus and graphene oxide (GO) via a one-step hydrothermal process. n-Dodecane, an organic liquid, was utilized as the energy storage medium. These hybrid composites offer advantageous morphology and favorable structures for phase change material having the ability of higher encapsulation and energy storage. The PCM loading capacities of BCH, BCH-GO, and GO were 50.4%, 70.6%, and 80.2%, with corresponding latent heats of 80.2, 110.3, and 130.2 J/g, respectively. The incorporation of GO along with BCH enhanced the capacity of latent heat storage of these novel PCMs in comparison to those without GO. The unblemished BCH had a reduced PCM loading ratio and latent heat in comparison to BCH-GO and GO, likely attributable to the restricted pore volume and robust intermolecular interactions between the reactive functional groups and PCM. Concurrently, the synthesized composite phase change materials demonstrated thermal stability and chemical compatibility. This synthesis technique aims to establish a platform for producing biochar-derived multifunctional phase change materials for specific applications.

Graphical abstract