Superior electrochemical performance of TiO2 sodium-ion battery anodes in diglyme-based electrolyte solution

Effect of Vinylene Carbonate Electrolyte Additive on the Surface Chemistry and Pseudocapacitive Sodium-Ion Storage of TiO2 Nanosheet Anodes

“…Low frequency sloping line corresponds to solid-state diffusion kinetics of Naions shown as Warburg impedance (Zw) while constant phase element (CPE) is used to model the surface storage of Na-ions. [7,49,55] Charge transfer resistances of pristine TiO2 nanosheet anodes in VC-free and VC-containing electrolyte solutions, obtained by fitting the Nyquist plot to the equivalent circuit, are 39 Ω and 171 Ω respectively. It is interesting Both cells demonstrated~100% coulombic efficiency after 750 cycles at a current density of 100 mA/g.…”

“…Despite their high energy density, moderate power density, and good cycle life, there are concerns regarding the future large-scale implementation of LIBs due to the limited availability of expensive ($17,000 per metric ton) lithium resources, where market demand will be up to two to six times extraction capacity in the next two decades [5,6]. Rechargeable sodium-ion batteries (SIBs) are very attractive in this regard, due to the abundance of inexpensive sodium resources [3,5,7,8]. Moreover, the similar electrochemistry and redox potentials of lithium and sodium (−3.02 and −2.71 V vs. SHE, respectively), make it a suitable candidate for efficient electrochemical energy storage [9][10][11].…”

“…Amorphous and different crystalline (anatase, bronze, rutile, etc.) polymorphs of TiO 2 have been investigated as promising Na-ion battery anodes [7,[27][28][29][30]. The existence of 2D intercalation channels in crystalline polymorphs make them superior to amorphous TiO 2 for Na-ion storage [4,9,31].…”

Robust S-doped TiO2@N,S-codoped carbon nanotube arrays as free-binder anodes for efficient sodium storage

“…To overcome the aforementioned issues, a series of strategies have been devised, including regulating the morphology at the nanometer scale [8], extending the interlayer distance of TiO 2 by the heteroatom doping [9], applying carbon-based materials as conductive matrix, so on [10,11]. Among them, conductive carbon coating alternatively becomes an effective approach to enhance the performance of TiO 2 , favorably improving the electron transport and playing a role of elastic buffer to strengthen the stability of TiO 2 [12][13][14]. Compared with the original carbon, doped carbon materials with heteroatoms (N, S, P. .…”

One-Pot Synthesized Biomass C-Si Nanocomposites as an Anodic Material for High-Performance Sodium-Ion Battery

“…Therefore, developing an excellent anode material is essential for demonstrating high-performance SIBs. Accordingly, several types of SIB anode materials have been proposed in resent studies [ 10 , 11 , 12 , 13 , 14 ]; for instance, tin (Sb) [ 15 ], antimony [ 16 ], phosphorus (P) [ 17 ], porous carbon (C) [ 18 ], silicon (Si) [ 19 ], titanium dioxide (TiO 2 ) [ 20 ], and chalcogenides [ 21 ] are typical examples that can move a step closer to the practical application of SIBs. Among them, Si is one of the most distinctive anode materials for rechargeable batteries because of theoretical expectations on its high specific capacity (i.e., 4200 mAh/g for LIBs [ 5 ] and 954 mAh/g for SIBs [ 22 , 23 ]).…”