Cathode nanoarchitectonics with Na3VFe0.5Ti0.5(PO4)3: Overcoming the energy barriers of multielectron reactions for sodium-ion batteries

被引：10

作者：

Soundharrajan, Vaiyapuri ^{[1
]}

Kim, Sungjin ^{[1
]}

Nithiananth, Subramanian ^{[2
]}

Alfaruqi, Muhammad H. ^{[1
,3
]}

Piao, Junji ^{[1
]}

Pham, Duong Tung ^{[4
]}

Mathew, Vinod ^{[1
]}

Han, Sang A. ^{[5
]}

Kim, Jung Ho ^{[5
]}

Kim, Jaekook ^{[1
,6
]}

机构：

[1] Chonnam Natl Univ, Dept Mat Sci & Engn, 300 Yongbong Dong, Gwangju 500757, South Korea

[2] Shizuoka Univ, Grad Sch Sci & Technol, Hamamatsu, Shizuoka, Japan

[3] Univ Teknol Sumbawa, Dept Tekn Met, Sumbawa, Indonesia

[4] Hanoi Univ Sci & Technol, Sch Engn Phys, Hanoi, Vietnam

[5] Univ Wollongong, Inst Superconducting & Elect Mat ISEM, Australian Inst Innovat Mat AIIM, North Wollongong, NSW, Australia

[6] Chonnam Natl Univ, Res Ctr Artificial Intelligence Assisted Ion Based, Gwangju, South Korea

来源：

CARBON ENERGY | 2024年 / 6卷 / 09期

基金：

新加坡国家研究基金会;

关键词：

Fe and Ti swapping; Na3VFe0.5Ti0.5(PO4)(3); prolonged cycle life; structural stability; ORGANIC FRAMEWORK-COMBUSTION; NA-ION; INTERCALATION; NA3V2(PO4)(3); PERFORMANCE; STRATEGY; NANOPARTICLES; V3+/V4+/V5+; MECHANISMS; ELECTRODE;

D O I：

10.1002/cey2.551

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：

High electrochemical stability and safety make Na+ superionic conductor (NASICON)-class cathodes highly desirable for Na-ion batteries (SIBs). However, their practical capacity is limited, leading to low specific energy. Furthermore, the low electrical conductivity combined with a decline in capacity upon prolonged cycling (>1000 cycles) related to the loss of active material-carbon conducting contact regions contributes to moderate rate performance and cycling stability. The need for high specific energy cathodes that meet practical electrochemical requirements has prompted a search for new materials. Herein, we introduce a new carbon-coated Na3VFe0.5Ti0.5(PO4)(3) (NVFTP/C) material as a promising candidate in the NASICON family of cathodes for SIBs. With a high specific energy of similar to 457 Wh kg(-1) and a high Na+ insertion voltage of 3.0 V versus Na+/Na, this cathode can undergo a reversible single-phase solid-solution and two-phase (de)sodiation evolution at 28 C (1 C = 174.7 mAh g(-1)) for up to 10,000 cycles. This study highlights the potential of utilizing low-cost and highly efficient cathodes made from Earth-abundant and harmless materials (Fe and Ti) with enriched Na+-storage properties in practical SIBs.

引用

页数：14

共 74 条

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