文章信息/Info

Title:

Application of Synchrotron Radiation Absorption Spectroscopy in Energy Storage Mechanism Research of NiCo2O4 Electrode Materials

文章編號(hào):

1674-3962(2025)05-0492-07

作者:

齊穎; 胡小雨; 萬初斌

1. 北京市實(shí)驗(yàn)室服務(wù)保障中心，北京 101100 2. 浙江大學(xué)材料科學(xué)與工程學(xué)院，浙江 杭州 310027 3. 北京科技大學(xué)數(shù)理學(xué)院，北京 100083

Author(s):

QI Ying;  HU Xiaoyu;  WAN Chubin

1. Laboratory Service Guarantee Center Beijing，Beijing 101100 2. School of Materials Science and Engineering, Zhejiang University，Hangzhou 310027 et al.

關(guān)鍵詞:

電極材料; NiCo2O4; 同步輻射; 微觀尺度; XAFS光譜

Keywords:

electrode materials;  NiCo2O4;  synchrotron radiation;  microscale;  XAFS spectroscopy

分類號(hào):

O57;TM91

DOI:

10.7502/j.issn.1674-3962.202212014

文獻(xiàn)標(biāo)志碼:

A

摘要:

同步輻射X射線吸收精細(xì)結(jié)構(gòu)（X-ray absorption fine structure，XAFS）光譜是一種基于同步輻射光源的強(qiáng)大分析技術(shù)，用于研究材料局域原子或電子結(jié)構(gòu)，XAFS技術(shù)廣泛應(yīng)用于物理學(xué)、材料學(xué)、化學(xué)、環(huán)境學(xué)等領(lǐng)域。整理了近些年XAFS技術(shù)在超級(jí)電容器NiCo2O4電極材料研究方面的應(yīng)用，主要內(nèi)容包括：① X射線吸收近邊結(jié)構(gòu)（X-ray absorption near edge structure, XANES）光譜在確定元素價(jià)態(tài)、電荷轉(zhuǎn)移上的應(yīng)用；② 擴(kuò)展X射線吸收精細(xì)結(jié)構(gòu)（extended X-ray absorption fine structure, EXAFS）光譜在確定原子配位結(jié)構(gòu)上的應(yīng)用；③ 原位XAFS在確定電化學(xué)反應(yīng)機(jī)理上的應(yīng)用。希望幫助科研人員從微觀結(jié)構(gòu)角度對NiCo2O4材料電化學(xué)儲(chǔ)能機(jī)理有更深入的理解，促進(jìn)NiCo2O4電極材料和超級(jí)電容器的發(fā)展。

Abstract:

X-ray absorption fine structure (XAFS) spectroscopy is a powerful analytical technique based on synchrotron radiation sources, commonly being used to study the local atomic or electronic structure of materials. The XAFS technique finds wide applications in physics, materials science, chemistry, environmental science, and other fields. This article summarizes the recent applications of XAFS technique in the research of electrode materials for supercapacitors,focusing on NiCo2O4 electrode materials. The main contents include: ① the application of XANES in determining the oxidation state of elements and charge transfer; ② the application of EXAFS in determining atomic coordination structures; ③ the application of in-situ XAFS in determining the electrochemical reaction mechanism. Hope this review help researchers gain a deeper understanding for the electrochemical energy storage mechanism of NiCo2O4 from a microstructural perspective, and promote the development of NiCo2O4 electrode materials and capacitors.