The recent advancements in key materials including reactants and catalysts employed in solid-gas, gas-gas, and liquid-gas solar thermochemical energy storage (TCES) systems are reviewed. The thermochemical properties of reactants such as carbonates, hydroxides, metal hydrides, metal oxides, organics, and ammonia are examined. The research status of the modification of these reactants, new material development, and catalyst improvement are also discussed. At present, the reactant materials suitable for solar TCES exhibit various deficiencies in terms of cyclic stability, reactivity, conversion rate, energy storage density, cost or safety, which hinder the commercial viability of solar TCES technology. To further enhance the maturity of solar TCES technology, it is imperative to develop advanced composite materials on the basis of known thermochemical reaction systems, improve novel efficient catalysts, and broaden demonstration application scenarios and scales in the future. The key materials should endow TCES systems with high energy storage density, more robust cyclic stability, and rapider reaction kinetics. It is preferred that they are readily available, non-corrosive, and non-toxic and more cost-effective.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |