研究人员创造出一种性能接近锂离子电池的金属电池：钾金属电池，而钾是一种更丰富、更便宜的元素。

Potassium metal battery emerges as a rival to lithium-ion technology

https://www.sciencedaily.com/releases/2020/03/200302153613.htm

Journal Reference:

1. Prateek Hundekar, Swastik Basu, Xiulin Fan, Lu Li, Anthony Yoshimura, Tushar Gupta, Varun Sarbada, Aniruddha Lakhnot, Rishabh Jain, Shankar Narayanan, View ORCID ProfileYunfeng Shi, Chunsheng Wang, and Nikhil Koratkar. In situ healing of dendrites in a potassium metal battery. PNAS, 2020 DOI: 10.1073/pnas.1915470117