Ying Mo, Wang Zhou, Kexuan Wang, Wenwen Yang, Zixu Liu, Shi Chen, Peng Gao and Jilei Liu
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引用次数: 0
Abstract
The performance of potassium-ion batteries (PIBs) with a graphite anode is highly dependent on the composition of the solid electrolyte interphase (SEI), which includes both organic and inorganic species. Currently, most research focuses on constructing an inorganic-rich SEI, while the critical role of organic components is barely understood, thus hindering the rational regulation of SEI chemistry. Herein, a tailored SEI composition with controllable organic/inorganic ratios on the graphite surface was obtained by simply adjusting the temperature. A series of experiments were conducted to evaluate their ionic transport capabilities and stability using Prussian white/graphite full cells. The organic component was identified as playing a crucial role in enhancing the kinetics. Consequently, the full cell with an organic-rich SEI (such as –(CH2CH2O)n–) exhibited good rate capability, whereas the full cell with an inorganic-rich SEI (such as KF) demonstrated excellent cycling performance. In comparison, the full cell with an organic–inorganic balanced SEI could provide fast K+ transport capabilities and good mechanical stability synergistically, thereby achieving good rate performance and cycling stability. Our research reveals the critical role of organic components in the SEI for optimizing K+ storage performance, providing valuable guidance for the rational design of SEI and offering significant potential for the development of high-performance PIBs.
期刊介绍:
Energy & Environmental Science, a peer-reviewed scientific journal, publishes original research and review articles covering interdisciplinary topics in the (bio)chemical and (bio)physical sciences, as well as chemical engineering disciplines. Published monthly by the Royal Society of Chemistry (RSC), a not-for-profit publisher, Energy & Environmental Science is recognized as a leading journal. It boasts an impressive impact factor of 8.500 as of 2009, ranking 8th among 140 journals in the category "Chemistry, Multidisciplinary," second among 71 journals in "Energy & Fuels," second among 128 journals in "Engineering, Chemical," and first among 181 scientific journals in "Environmental Sciences."
Energy & Environmental Science publishes various types of articles, including Research Papers (original scientific work), Review Articles, Perspectives, and Minireviews (feature review-type articles of broad interest), Communications (original scientific work of an urgent nature), Opinions (personal, often speculative viewpoints or hypotheses on current topics), and Analysis Articles (in-depth examination of energy-related issues).