Journal
ACS NANO
Volume 15, Issue 12, Pages 18931-18973Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.1c08428
Keywords
battery-type anode materials; Faradaic reactions; potassium ion storage; host-guest relationships; underlying reaction mechanisms; potassium ion battery; potassium ion capacitor; energy storage systems
Categories
Funding
- Australian National Fabrication Facility's Queensland Node (ANFF-Q)
- JST-ERATO Yamauchi Materials Space-Tectonics Project [JPMJER2003]
- national research foundation of Korea (NRF) - Korea government (MIST) [NRF-2019R1A2C2090443]
- Korea Electric Power Corporation [R19XO01-23]
- Nano.Material Technology Development Program [NRF-2017M3A7B4041987]
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The article discusses the operation principles and performance indicators of potassium ion energy storage systems, as well as significant advances in various types of battery-type anode materials. It emphasizes the correlation between host-guest relationships and electrochemical properties, and highlights promising optimization strategies to improve K+ storage performance. Perspectives on future trends aimed at accelerating the development of potassium ion energy storage systems are also provided.
Potassium ion energy storage devices are competitive candidates for grid-scale energy storage applications owing to the abundancy and cost-effectiveness of potassium (K) resources, the low standard redox potential of K/K+, and the high ionic conductivity in K-salt-containing electrolytes. However, the sluggish reaction dynamics and poor structural instability of battery-type anodes caused by the insertion/extraction of large K+ ions inhibit the full potential of K ion energy storage systems. Extensive efforts have been devoted to the exploration of promising anode materials. This Review begins with a brief introduction of the operation principles and performance indicators of typical K ion energy storage systems and significant advances in different types of battery-type anode materials, including intercalation-, mixed surface-capacitive-/intercalation-, conversion-, alloy-, mixed conversion-/alloy-, and organic-type materials. Subsequently, host-guest relationships are discussed in correlation with the electrochemical properties, underlying mechanisms, and critical issues faced by each type of anode material concerning their implementation in K ion energy storage systems. Several promising optimization strategies to improve the K+ storage performance are highlighted. Finally, perspectives on future trends are provided, which are aimed at accelerating the development of K ion energy storage systems.
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