Green phase-change composite absorbs/ releases heat during melting/ solidification, buffering buildings' indoor temperature swings

https://www.eurekalert.org/news-releases/1113564

"spruce wood biochar, montmorillonite clay, paraffin... biochar-clay scaffold increases thermal energy storage capacity 223% compared to clay-only/ improves thermal conductivity by 78% over pure paraffin... maintains >95% heat storage capacity after 1K cycles with negligible leakage... cooling consumption reduced 54% compared to bulk paraffin/ 24.3% compared to buildings without composite... more sustainable/ cost-effective than graphene... future: replace synthetic surfactants with bio-based molecules"