Details
| Original language | English |
|---|---|
| Article number | 145892 |
| Journal | Electrochimica acta |
| Volume | 521 |
| Early online date | 22 Feb 2025 |
| Publication status | E-pub ahead of print - 22 Feb 2025 |
Abstract
The shuttle effect and sluggish sulfur redox kinetics are the primary factors that influence the cycle life of lithium-sulfur (Li-S) batteries. Therefore, investigating electrocatalysts with a large number of active sites and high activity to improve the conversion kinetics of soluble lithium polysulfides (LiPS) is quite critical to solve these problems. In this study, surface engineering induced highly dispersible and polycrystalline structured catalyst of phosphatized nickel oxides (NiOPs) was prepared using bacterial cellulose (BNF) as a carrier and followed by partial phosphorization. Specifically, the as optimized nano NiOP-1 h (phosphating for 1 h) catalyst show an abundant polycrystalline structure of Ni2P/Ni5P4 and also appropriate interaction with LiPS, which helps it greatly overperform the pristine NiO, N2P and other partially phosphorized NiOP for enhancing the sulfur redox. The Li-S cells with paper-based NiOP-1 h electrodes can achieve a maximum capacity of 3.4 mAh cm−2 at 0.15C, even with sulfur loading of 4 mg cm−2 and lean electrolyte of 6.7 µL mg−1. This method demonstrates the potential for preparing electrocatalysts characterized by high dispersibility and abundant active sites, offering applications in various other domains.
Keywords
- Lithium-sulfur batteries, Nickel phosphide, Paper-based electrode, Phosphorization, Polycrystalline
ASJC Scopus subject areas
- Chemical Engineering(all)
- General Chemical Engineering
- Chemistry(all)
- Electrochemistry
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In: Electrochimica acta, Vol. 521, 145892, 01.05.2025.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Surface engineering-induced highly dispersed and polycrystalline structured nickel phosphide nano catalysts for lithium-sulfur batteries
AU - Wu, Haoteng
AU - Wu, Haiwei
AU - Ren, Xuan
AU - Li, Ruihua
AU - Wang, Huan
AU - Jia, Wenhao
AU - Lin, Zhihua
AU - Liu, Hanbin
AU - Xiong, Chuanyin
AU - Zhang, Lin
N1 - Publisher Copyright: © 2025 Elsevier Ltd
PY - 2025/2/22
Y1 - 2025/2/22
N2 - The shuttle effect and sluggish sulfur redox kinetics are the primary factors that influence the cycle life of lithium-sulfur (Li-S) batteries. Therefore, investigating electrocatalysts with a large number of active sites and high activity to improve the conversion kinetics of soluble lithium polysulfides (LiPS) is quite critical to solve these problems. In this study, surface engineering induced highly dispersible and polycrystalline structured catalyst of phosphatized nickel oxides (NiOPs) was prepared using bacterial cellulose (BNF) as a carrier and followed by partial phosphorization. Specifically, the as optimized nano NiOP-1 h (phosphating for 1 h) catalyst show an abundant polycrystalline structure of Ni2P/Ni5P4 and also appropriate interaction with LiPS, which helps it greatly overperform the pristine NiO, N2P and other partially phosphorized NiOP for enhancing the sulfur redox. The Li-S cells with paper-based NiOP-1 h electrodes can achieve a maximum capacity of 3.4 mAh cm−2 at 0.15C, even with sulfur loading of 4 mg cm−2 and lean electrolyte of 6.7 µL mg−1. This method demonstrates the potential for preparing electrocatalysts characterized by high dispersibility and abundant active sites, offering applications in various other domains.
AB - The shuttle effect and sluggish sulfur redox kinetics are the primary factors that influence the cycle life of lithium-sulfur (Li-S) batteries. Therefore, investigating electrocatalysts with a large number of active sites and high activity to improve the conversion kinetics of soluble lithium polysulfides (LiPS) is quite critical to solve these problems. In this study, surface engineering induced highly dispersible and polycrystalline structured catalyst of phosphatized nickel oxides (NiOPs) was prepared using bacterial cellulose (BNF) as a carrier and followed by partial phosphorization. Specifically, the as optimized nano NiOP-1 h (phosphating for 1 h) catalyst show an abundant polycrystalline structure of Ni2P/Ni5P4 and also appropriate interaction with LiPS, which helps it greatly overperform the pristine NiO, N2P and other partially phosphorized NiOP for enhancing the sulfur redox. The Li-S cells with paper-based NiOP-1 h electrodes can achieve a maximum capacity of 3.4 mAh cm−2 at 0.15C, even with sulfur loading of 4 mg cm−2 and lean electrolyte of 6.7 µL mg−1. This method demonstrates the potential for preparing electrocatalysts characterized by high dispersibility and abundant active sites, offering applications in various other domains.
KW - Lithium-sulfur batteries
KW - Nickel phosphide
KW - Paper-based electrode
KW - Phosphorization
KW - Polycrystalline
UR - http://www.scopus.com/inward/record.url?scp=85218415361&partnerID=8YFLogxK
U2 - 10.1016/j.electacta.2025.145892
DO - 10.1016/j.electacta.2025.145892
M3 - Article
AN - SCOPUS:85218415361
VL - 521
JO - Electrochimica acta
JF - Electrochimica acta
SN - 0013-4686
M1 - 145892
ER -