“…As a result, they offer insufficient photothermal conversion and real-environment output power. 9 New PCMs and composites, such as integrating copper foam, graphite, and boron nitride, graphitic carbon nitride and fatty alcohol, and a form-stable PCM based on alkali activated date seed biochar, 10–13 that can overcome the shortcomings of organic and inorganic PCMs are therefore urgently required. 14 By incorporating multiple functional materials, special PCMs have been created to address the aforementioned PCM shortcomings.…”