期刊
JOURNAL OF POWER SOURCES
卷 474, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2020.228491
关键词
Lithium-ion battery; Potassium-ion battery; Co3O4; Nanostructure; Anode; Combustion
资金
- National Natural Science Foundation of China [51572229]
- National Key Research and Development Program of China [2018YFB0104204]
- Key Program of Education Department in Sichuan province, China [16ZA0138]
- Opening Project of Material Corrosion and Protection Key Laboratory of Sichuan province, China [2018CL17]
- Longshan Academic Talent Research Supporting Program of Southwest University of Science and Technology, China [17LZX539, 18LZX680, 17LZXT02, 18LZXT01]
Rising cost has generated extended interest from lithium-ion (LIBs) to potassium-ion batteries (PIBs). Here, attempts are concentrated on comparative study on electrochemical Li and K storage behavior features for porous nanoflaked (PNF) CO3O4 anode in LIBs and PIBs. PNF-CO3O4 is synthesized by a facile solution-combustion route and its growth-mechanism is proposed as bubble-gum fracturing effect. Such PNF-CO3O4 presents both encouraging Li and K storage reactivity. But considering larger-sized K+, it presents a slightly lower reversible capacity (417 mAh g(-1)) and obviously higher charge-transfer-resistance (516.8 Omega) in PIBs than LIBs (743.9 mAh g(-1), 46.0 Omega), implying moderate K+ electrode-kinetics. However, this capacity in PIBs is better than most explored carbon/alloy-based PIBs-anodes. Additionally, first, the substantially lower (nearly 1 V difference) discharge-plateau in PIBs than LIBs indicates a higher operating-voltage full-cell for PIBs than LIBs; Second, this discharge-plateau (0.3 V vs. K+/K) in PIBs slightly higher than potassium-plating-potential could potentially alleviate partial dendrite-formation. Also, enhanced performance for PNF-CO3O4 compared with bulk-CO3O4 confirms marked benefits of PNF-structure in both LIBs and PIBs on shortening Li+/K+ diffusion-distance and enduring volume-swelling. These findings demonstrate extended advantages from LIBs to PIBs for nanostructured CO3O4 and offer a better understanding of its Li and K storage behavior.
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