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A new Fe-substituted TiFeNb10O29−δ (TFNO) anode is proposed. TFNO possesses a defective and polycrystalline ReO3 Roth–Wadsley shear structure with a slightly larger lattice volume. Electrochemical behavior results and density functional theory (DFT) calculations show that TFNO can facilitate the kinetics of electron/Li+ transportation and demonstrates pseudocapacitive behavior. Consequently, TFNO exhibits superior high rate capacity and cycling stability compared to pristine TNO, offering 100 mA h g−1 at an ultrahigh rate of 50C and a high capacity retention of 86.7% over 1000 cycles at 10C. This work reveals that TFNO could be a promising anode material for fast-charging, stable, and safe LIBs. [ABSTRACT FROM AUTHOR]

A new Fe-substituted TiFeNb 10 O 29- δ (TFNO) anode is proposed. TFNO possesses a defective and polycrystalline ReO 3 Roth-Wadsley shear structure with a slightly larger lattice volume. Electrochemical behavior results and density functional theory (DFT) calculations show that TFNO can facilitate the kinetics of electron/Li + transportation and demonstrates pseudocapacitive behavior. Consequently, TFNO exhibits superior high rate capacity and cycling stability compared to pristine TNO, offering 100 mA h g -1 at an ultrahigh rate of 50C and a high capacity retention of 86.7% over 1000 cycles at 10C. This work reveals that TFNO could be a promising anode material for fast-charging, stable, and safe LIBs.

Superparamagnetic Fe 3 O 4 nanoparticles were successfully deposited on the surface of MoS 2 nanosheets (Fe 3 O 4 /MoS 2 ) by a sonochemical method and the obtained Fe 3 O 4 /MoS 2 nanocomposites were used as a promising candidate for a magnetorheological (MR) fluid. This MR fluid was prepared from the Fe 3 O 4 /MoS 2 nanocomposites and its corresponding MR performances were examined using a rotational rheometer. The MR fluid based on Fe 3 O 4 /MoS 2 showed typical MR effects with increasing viscosity, shear stress, yield stress and dynamic shear modulus depending on the applied magnetic fields. Compared with commercial carbonyl iron (CI) particles, the sedimentation stability of the Fe 3 O 4 /MoS 2 -MR fluid was greatly improved because of its unique two-dimensional structure and the reduced fluid-particle density mismatch. Therefore, the prepared Fe 3 O 4 /MoS 2 -based MR fluid with typical MR effects and good sedimentation stability would have great potential in practical applications.