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

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Title
Pseudo-capacitive and kinetic enhancement of metal oxides and pillared graphite composite for stabilizing battery anodes
Author(s)
Luo, Yongguang; Lingling Wang; Li, Qian; Jungsue Choi; G. Hwan Park; Zheng, Zhiyong; Yang Liu; Hongdan Wang; Hyoyoung Lee
Publication Date
2022-07
Journal
SCIENTIFIC REPORTS, v.12, no.1
Publisher
NATURE PORTFOLIO
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]rTiO(2)-PGN) in order to construct an advanced and reliable energy storage material with a unique configuration for energy storage processes. The suggested SnO2[O]rTiO(2)-PGN configuration provides sturdy interconnections between phases and chemically wraps the SnO2 nanoparticles around disordered TiO2 (SnO2[O]rTiO(2)) into a cushioning plier-linked graphite network (PGN) system with nanometer interlayer distance (similar to 1.2 nm). Subsequently, the SnO2[O]rTiO(2)-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.
URI
https://pr.ibs.re.kr/handle/8788114/12148
DOI
10.1038/s41598-022-15789-0
ISSN
2045-2322
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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