A Sandwich-Structured Na2Ti6O13/Reduced Graphene Oxide Composite for Improved Energy Storage in Sodium-Ion Batteries

被引：1

作者：

Song, Jungwook ^{[1
]}

Han, Jungmin ^{[2
]}

Ju, Hwi Cheol ^{[1
]}

Seo, Hyun A. ^{[1
]}

Yun, Boram ^{[1
]}

Moon, Dohyun ^{[3
]}

Choi, Dukhyun ^{[2
,4
]}

Kim, Jongsik ^{[1
,5
]}

机构：

[1] Dong A Univ, Dept Chem Engn, FOUR Grad Program BK21, Busan 49315, South Korea

[2] Sungkyunkwan Univ SKKU, Dept Future Energy Engn DFEE, Suwon 16419, South Korea

[3] Pohang Accelerator Lab, Beamline Dept, Pohang 37673, South Korea

[4] Sungkyunkwan Univ SKKU, Sch Mech Engn, Suwon 16419, South Korea

[5] Dong A Univ, Dept Chem, Busan 49315, South Korea

来源：

SMALL METHODS | 2025年

基金：

新加坡国家研究基金会;

关键词：

anode; reduced graphene oxide; sodium titanate; sodium-ion batteries; HIGH-PERFORMANCE ANODE; NA-ION; HIGH-CAPACITY; NA2TI3O7; EXFOLIATION;

D O I：

10.1002/smtd.202500671

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Sodium-ion batteries (SIBs) have the potential to be a cost-effective and sustainable solution for large-scale energy storage systems (ESSs) due to the abundance of sodium reserves. Na2Ti6O13 has been considered as a suitable candidate for use as an anode material in SIBs owing to its environmental friendliness, low cost, and excellent cycling stability. Despite its advantages, Na2Ti6O13 has intrinsic limitations such as electrical conductivity. To overcome these obstacles, a sandwich-structured Na2Ti6O13/reduced graphene oxide (rGO) composite is synthesized through a liquid-phase exfoliation and restacking method using electrostatic interactions. The Na2Ti6O13/rGO composite showed remarkable improvement in both reversible discharge capacity and cycle stability. In comparison to bare Na2Ti6O13 with a discharge capacity of 20.1 mAh g-1 after 500 cycles, the Na2Ti6O13/rGO1 composite displayed a discharge capacity of 196.5 mAh g-1 at a current density of 0.1 A g-1 and a voltage range of 0.01-2.5 V. Furthermore, the Na2Ti6O13/rGO1||Na3V2(PO4)3 full cell are assembled, discharging an energy density of 251.3 Wh kg-1anode with a power density of 228.1 W kg-1anode after 100 cycles in a voltage range of 1.0-4.0 V.

引用

页数：14

共 61 条

[1] Nature-Inspired Na2Ti3O7 Nanosheets-Formed Three-Dimensional Microflowers Architecture as a High-Performance Anode Material for Rechargeable Sodium-Ion Batteries [J].