The Netherlands-based research, publishing and information analytics company, released a report on the status of global clean energy research Wednesday.
The report says China has published about 400,000 research papers about clean energy since 2001, the most in the world. The country focused on research related to lithium battery or secondary battery over the last decade.
In terms of the number of patents, China beat the United States in 2012 and Japan in 2014 to become the country with the highest number of clean- energy patents. By the end of 2020, almost half of the global patents in this field were from China.