Magnetically Triggered Interplay of Capacitive and Diffusion Contributions for Boosted Supercapacitor Performance

材料科学 超级电容器 氢氧化物 化学物理 化学工程 电极 无机化学 纳米技术 电容 物理化学 化学 冶金 工程类
作者
Peeyush Pandey,Sourav Bhowmick,Mohammad Qureshi
出处
期刊:ACS Applied Materials & Interfaces [American Chemical Society]
卷期号:15 (33): 39435-39447 被引量:14
标识
DOI:10.1021/acsami.3c08988
摘要

The chemistry involved in supercapacitors in terms of their mechanistic contributions leading to improved specific capacity will aid in easy commercialization. The main contributory factors in a supercapacitor are either capacitive (non-diffusion controlled) or ion-diffusion behavior, which results in enhanced charge-discharge characteristics of a supercapacitor reflected in its power density, whereas ion-diffusion behavior will lead to the enhanced energy density of a supercapacitor. In this context, the present article attempts to understand the use of external magnetic fields, leading to the interplay between capacitive and ion-diffusion behavior in a high-performance supercapacitor. The model system chosen in the present study, nickel cobalt copper carbonate hydroxide (NiCoCuCH), can effectively address the interplay between capacitive and ion diffusion contributions by varying total magnetic effects involving magnetic dilution. The magneto-enhancement of the electrodes nickel cobalt copper carbonate hydroxide (NiCoCuCH) and aluminum-doped nickel cobalt copper carbonate hydroxide (Al-NiCoCuCH) was demonstrated under the magnetic field from 0 to 250 mT. Both NiCoCuCH and Al-NiCoCuCH show dominant non-diffusion-controlled (capacitive) and diffusion-controlled behavior as a function of the applied external magnetic field. Under the influence of the external magnetic field, ferromagnetic coupling between metal-oxygen-metal centers via oxygen 2p orbitals enhances, leading to a facile redox pathway. To further control the charge-discharge behavior of the electrode via the interplay between diffusive and capacitive, a non-magnetic ion, Al3+, was doped into the bare metal carbonate hydroxide crystal lattice. The Al3+ ion not only alters the crystal symmetry but also restricts the alignment of the magnetic domains in the electrode, leading to a sluggish redox pathway, effectively increasing the capacitive contribution, and leading to improved charge-discharge characteristics at the expense of energy density. We have constructed an asymmetric device with the best-performing (110 mT) NiCoCuCH electrode as a positive electrode and activated carbon as a negative electrode. The NiCoCuCH/AC ASC device at 110 mT has the largest specific capacity (1100 C g-1 at 2 A g-1) at 110 mT, leading to a high energy density (250 W h kg-1) and a power density (1.7 kW kg-1) of the electrode.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
123123完成签到 ,获得积分10
1秒前
温暖宛筠完成签到,获得积分10
1秒前
小欣6116完成签到,获得积分10
2秒前
请叫我风吹麦浪应助冬月采纳,获得10
2秒前
LIUYONG发布了新的文献求助10
3秒前
3秒前
肖雪依完成签到,获得积分10
3秒前
影子完成签到,获得积分10
4秒前
5秒前
晨珂完成签到,获得积分10
5秒前
Florencia发布了新的文献求助10
7秒前
xiezhuochun发布了新的文献求助10
8秒前
8秒前
同瓜不同命完成签到,获得积分10
10秒前
牛马哥发布了新的文献求助10
11秒前
温婉的松鼠完成签到,获得积分10
11秒前
12秒前
辛勤的寄瑶完成签到,获得积分10
12秒前
Lauren完成签到 ,获得积分10
13秒前
14秒前
忆枫完成签到,获得积分10
18秒前
炒鸡小将发布了新的文献求助10
18秒前
花壳在逃野猪完成签到 ,获得积分10
18秒前
18秒前
银子吃好的完成签到,获得积分10
19秒前
西瓜霜完成签到 ,获得积分10
19秒前
科研废物完成签到 ,获得积分10
21秒前
冬月完成签到,获得积分10
21秒前
21秒前
马东完成签到,获得积分10
23秒前
搜集达人应助动听的秋白采纳,获得10
23秒前
24秒前
量子星尘发布了新的文献求助10
24秒前
华仔应助炒鸡小将采纳,获得10
25秒前
chizhi完成签到,获得积分10
25秒前
雪雨夜心应助白智妍采纳,获得10
26秒前
祁乐安发布了新的文献求助20
27秒前
fang应助科研通管家采纳,获得10
28秒前
梵高的向日葵完成签到,获得积分10
28秒前
Singularity应助科研通管家采纳,获得10
28秒前
高分求助中
【提示信息,请勿应助】关于scihub 10000
Les Mantodea de Guyane: Insecta, Polyneoptera [The Mantids of French Guiana] 3000
徐淮辽南地区新元古代叠层石及生物地层 3000
The Mother of All Tableaux: Order, Equivalence, and Geometry in the Large-scale Structure of Optimality Theory 3000
Handbook of Industrial Diamonds.Vol2 1100
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 4038303
求助须知:如何正确求助?哪些是违规求助? 3576013
关于积分的说明 11374210
捐赠科研通 3305780
什么是DOI,文献DOI怎么找? 1819322
邀请新用户注册赠送积分活动 892672
科研通“疑难数据库(出版商)”最低求助积分说明 815029