Unraveling the energy storage mechanism of biphase TiO2(B)/TiO2(A) slurry and its application in lithium slurry battery

The development of a very stable, high-specific-capacity anolyte is vital to the realization of high-energy -density lithium slurry batteries (LSBs). 1D biphase bronze/anatase TiO2 (TiO2(B)/TiO2(A)) nanotube structure is regarded as a promising anode material for LSBs since it can not only dramatically shorten the Li thorn diffusion and electron conduction pathways while provide higher lithium storage capacity, but also improve the stability of slurry due to the increased viscosity. Herein, TiO2(B)/TiO2(A) nanotubes are effectively produced as anode materials. The conductivity, rheological, and electrochemical character-istics of the produced anolyte are considered while developing the slurry electrode formulation. The electrochemical reaction mechanism of slurry electrode and conventional electrode are identical, however, the former has a slower lithium-ion diffusion rate. The initial specific charge capacity of the slurry pouch cell constructed using TiO2(B)/TiO2(A) and LiFePO4 slurry is 206.1 mAh/g. After 50 cycles, the Coulombic efficiency is 96.7%, the voltage efficiency is 91.4%, and the energy efficiency is 88.3%, respectively. The development of the slurry full battery is aided by the construction and assessment of the slurry pouch battery.(c) 2023 Elsevier Ltd. All rights reserved.

Automated summary

The development of a stable and high-capacity anolyte is crucial for high-energy-density lithium slurry batteries (LSBs). In this study, 1D biphase bronze/anatase TiO2 nanotube structure was successfully produced as an anode material for LSBs. The TiO2 nanotubes not only shorten the diffusion and conduction pathways for lithium ions and electrons, but also improve the stability of the slurry. The slurry pouch cell constructed using TiO2 nanotubes exhibited good electrochemical performance.