“…In recent decades, with the development of large‐scale industrialization, traditional fossil fuels such as coal, oil, natural gas, and other nonrenewable energy sources have been rapidly consumed, leading several huge issues, including resource exhaustion, environmental deterioration, the greenhouse effect, acid rain, pollutant haze, and so on. [ 1–5 ] Environment friendly and renewable energy need to be developed urgently. [ 6–8 ] The traditional renewable energy systems, however, such as solar energy, wind energy, geothermal energy, and tidal power, are limited by geographical location, and intermittent and unstable voltage output, so that they cannot effectively solve current energy problems.…”