Currently, most people spend 90% of their daily time inside, relying on mechanical heating and air conditioning. Space heating is the largest source of final energy demand, making up about 50% of the total each year. Existing buildings often have insulation and central heating added to reduce energy consumption for heating, which increases construction costs and carbon emissions. Here, a potent and attainable strategy was demonstrated to process lignocellulose into a high-performance passive solar heating wood with satisfactory passive solar heating and mechanical properties. The passive solar heating wood could absorb ultraviolet light and convert it into thermal energy, resulting in continuous above-ambient heating during the cold day. Compared to traditional building materials, passive solar heating wood exhibits superior heating performance (average daytime heating of ∼25.6 °C) and thermal insulation performance (mid-IR emissivity of 0.51). In addition, the passive solar heating wood exhibits ultra-strong specific strength (80.1 MPa g⁻¹ cm³) and specific impact toughness (56.33 kJ m⁻² g⁻¹ cm³) than the most of common polymers, ceramics, and concrete, which opens the way for practical application of lignocellulose based structural materials in advanced thermal management buildings.

目前，大多数人每天 90% 的时间都在室内度过，主要依靠机械供暖和空调。空间供暖是最终能源需求的最大来源，每年约占总量的 50%。现有建筑通常会增加保温和集中供暖，以减少供暖能耗，从而增加建筑成本和碳排放。在这里，展示了一种有效且可实现的策略，将木质纤维素加工成具有令人满意的被动太阳能加热和机械性能的高性能被动太阳能加热木材。被动式太阳能加热木材可以吸收紫外线并将其转化为热能，从而在寒冷的日子里持续加热高于环境温度。与传统建材相比，被动太阳能加热木材表现出卓越的加热性能（平均白天加热 ~25.6 °C）和隔热性能（中红外发射率为 0.51）。此外，被动式太阳能采暖木材表现出超强的比强度（80.1 MPa·g⁻¹ cm ³ ) 和比冲击韧性 (56.33 kJ m ⁻² g ⁻¹ cm ³ ) 高于大多数常见的聚合物、陶瓷和混凝土，这为木质纤维素基结构材料在先进热管理建筑中的实际应用开辟了道路.