Amorphous TiO2 inverse opal anode for high-rate sodium ion batteries
Abstract Potential applications of sodium-ion batteries (SIBs) have motivated significant research interest in grid-scale energy storage. However, large radius of Na ions results in different electrochemical behaves. Therefore, synergistic understanding of the differences is greatly interested for future development of SIBs. Surface availability for ions with poor affinity to electrode materials is critical to rate performance in SIBs, but yet has rarely been reported. Here, to overcome the obstacles of material platform, amorphous TiO 2 inverse opal is employed as a proof-of-concept prototype to illuminate the effects of surface ion availability and its relationship between solvent wettability and rate capability. Within expectation, superior rate capabilities are achieved in return for enhanced solvent wettability, regardless of the type of electrolyte and the ion concentration in electrolyte. Even when the anode is cycled at a current density as high as 5000mAg −1 , the reversible capacity could still retain a high value of ~113mAhg −1 . Our concept opens up a promising avenue to realize full potential of designing electrode materials for SIBs by adjusting the surface kinetics. This understanding shall extend the design principle to electrode materials for highly effective energy storage using other transport ions and other storage mechanisms. Highlights Exploring surface engineering of kinetic limitation for sodium ion batteries. Proof-and-concept demonstration by inverse opal platform. Amorphous TiO 2 as a bridge to understand the influences of solvent wettability. In-depth insights of superior rate performance among TiO 2 -based sodium ion batteries. Graphical abstract [DISPLAY OMISSION]
유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.
원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.
NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.
- 이 논문과 함께 출판된 논문 + 더보기