Pseudo-capacitive and kinetic enhancement of metal oxides and pillared graphite composite for stabilizing battery anodes.

ABSTRACT: Nanostructured TiO₂ and SnO₂ possess reciprocal energy storage properties, but challenges remain in fully exploiting their complementary merits. Here, this study reports a strategy of chemically suturing metal oxides in a cushioning graphite network (SnO₂[O]rTiO₂-PGN) in order to construct an advanced and reliable energy storage material with a unique configuration for energy storage processes. The suggested SnO₂[O]rTiO₂-PGN configuration provides sturdy interconnections between phases and chemically wraps the SnO₂ nanoparticles around disordered TiO₂ (SnO₂[O]rTiO₂) into a cushioning plier-linked graphite network (PGN) system with nanometer interlayer distance (~ 1.2 nm). Subsequently, the SnO₂[O]rTiO₂-PGN reveals superior lithium-ion storage performance compared to all 16 of the control group samples and commercial graphite anode (keeps around 600 mAh g^-1 at 100 mA g^-1 after 250 cycles). This work clarifies the enhanced pseudo-capacitive contribution and the major diffusion-controlled energy storage kinetics. The validity of preventing volume expansion is demonstrated through the visualized image evidence of electrode integrity.

SUBMITTER: Luo Y 

PROVIDER: S-EPMC9287451 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature