Abstract:
Due to the rarity of lithium (0.0017 wt% in the earth's crust), it is doubtful that lithium-ion batteries (LIBs) will meet the enormous demand for applications such as electric vehicles and grid-scale storage. Potassium-ion batteries (PIBs) may replace LIBs as energy storage systems due to multiple unique attributes, such as low cost, abundant resource availability (approximately 2.09 wt%, ranking seventh in the crust), and low reduction potential [K+/K (-2.94 V versus a standard hydrogen electrode); Li+/Li (-3.04 V); Na+/Na (-2.71 V)].The emerging high-tech and novel applications require foldable and bendable batteries with high volumetric and gravimetric energy density that can adapt to any electronic devices. High theoretical specific capacity materials for PIB anodes, including Bi, Sb, P, and Se are potential replacement of commercial graphite anodes, but they suffer from dramatic volume changes (~400%) resulted from insertion/extraction of potassium ions during charge/discharge process, which ultimately causes pulverization of active materials and leads to short battery cycle life. In this talk, I will discuss how to alleviate the volume expansion problems of these high-capacity materials by nanostructurization and use them as high-performance potassium ion battery anodes.1-5 For example, the graphical abstract shows how we effectively activate red phosphorus as an anode for potassium-ion batteries with a record‐high specific energy density.
Keywords - battery, anode, potassium, nanomaterials, electrode.
References:
- Kuan-Ting Chen, Yi-Chun Yang, Lian-Ming Lyu, Ming-Yen Lu, and Hsing-Yu Tuan Nano Energy2021, 88, 106233
- Yi-Yen Hsieh, Kuan-Ting Chen, and Hsing-Yu Tuan Chemical engineering journal2021, 420, 130451
- Kuan-Ting Chen, Shaokun Chong, Lingling Yuan, Yi-Chun Yang, Hsing-Yu Tuan Energy Storage Materials2021, 39, 239-249
- Kuan-Ting Chen and Hsing-Yu Tuan ACS NANO, 2020, 14, 11648-11661
- Wei-Chung Chang, Jen-Hsuan Wu, Kuan-Ting Chen, and Hsing-Yu Tuan. Advanced Science, 2019, 6, 1801354