Calcium-based batteries have attracted increasing attention as promising candidates for next-generation energy storage, owing to the natural abundance of calcium (approximately 2500 times more abundant than lithium in the Earth's crust), its high volumetric capacity (2073 mA·h·cm-3), and favourable environmental profile. Despite these advantages, their development remains hindered by several fundamental challenges, including inefficient and irreversible calcium metal plating/stripping, narrow electrochemical stability windows of electrolytes, and the scarcity of high-performance cathode materials. Here we provide a comprehensive overview of recent progress in calcium-based battery research, with a focus on calcium metal anode design, rational electrolyte design, development of cathode chemistries, and advances in cell configurations. We critically examine the underlying mechanisms and representative strategies proposed to address current bottlenecks, and discuss emerging opportunities for calcium-based systems in grid-scale and extreme-environment applications. This Review aims to offer a clear perspective on the path toward practical calcium-based batteries and to inspire future research directions for unlocking their full potential.
| 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 |