Mesoporous TiO₂–B Microspheres with Superior Rate Performance for Lithium Ion Batteries

Abstract

Mesoporous TiO2–B microspheres with a favorable material architecture are designed and synthesized for highpower lithium ion batteries. This material, which combines the advantages of fast lithium transport with a pseudocapacitive mechanism, adequate electrode‐electrolyte contact, and compact particle packing in the electrode layer, shows superior high‐rate charge–discharge capability and long‐time cyclability for lithium ion batteries.

Fast synthesis of uniform mesoporous titania submicrospheres with high tap densities for high-volumetric performance Li-ion batteries

“…This is beneficial for the uniform coating of the conductive agent onto the spheres during the electrode fabrication, which is believed to improve the transmission of electrons. 4) The spherical mesoporous TiO2 has better particle mobility, leading to the formation of a more compact electrode layer [15,16]. More importantly, the UMTSs have a very high tap density and are thus capable of forming compact electrodes and yielding a high volumetric performance.…”

“…In addition to the aforementioned advantages, mesoporous TiO2 submicrospheres have abundant pores, densely packed nanocrystals, a relatively large size, and a spherical morphology, granting them unique traits, including adequate access for electrolyte entry, a high tap density, the absence of aggregation, and the formation of a compact electrode layer [15][16][17]. Soft-templating method is one of the most common methods for the synthesis of high-quality mesoporous TiO2 spheres.…”

Three-dimensional-networked NiCo2S4 nanosheet array/carbon cloth anodes for high-performance lithium-ion batteries

“…44 Moreover, it is less likely that an electrode consisting of binder and conductive carbon can provide a large and effective contact area between the active material and the electrolyte, maintain a short diffusion distance for Li + or suitably accommodate mechanical strain during cycling. 45 In comparison with the NiCo 2 S 4 flower electrode, the 3D-networked NiCo 2 S 4 NSA/carbon cloth electrode possesses the following merits: (1) NiCo 2 S 4 has inherently high electronic conductivity (~4 orders of magnitude higher than that of conventional MO semiconductors); and the nanosheets are anchored tightly to the (carbon fiber) current collector, forming good electrical contact. Moreover, the hybrid structure can be used directly as an anode without the addition of binders and conductive carbon, as illustrated in Figure 5d.…”

Synthesis, morphology and electrochemical properties of TiO2 microspheres

“…Samples consisting of spherical TiO 2 particles obtained by various methods based mainly on the hydrolysis of organic derivatives of titanium are extensively probed as photocatalysts and electrode materials in lithium-ion batteries [3][4][5][6][7][8][9][10]. The spherical form of titanium dioxide seems to be the most common since numerous varieties of this substance including nanorods [4] and nanosheets [10] tend to self-organize forming microspheres.…”

“…In this paper, a novel method for the synthesis of TiO 2 microspheres in «mild» conditions, viz., in solutions of moderate concentration, at medium temperature and ambient pressure is presented, and morphology and electrochemical properties of the material obtained are described. Following our previous work [14] and unlike other approaches [1][2][3][4][5][6][7][8][9][10][11][12][13], we use TiCl 4 instead of organic derivatives of titanium as a raw material.…”