Oxide versus Nonoxide Cathode Materials for Aqueous Zn Batteries: An Insight into the Charge Storage Mechanism and Consequences Thereof

材料科学 无机化学 机制(生物学) 氧化物 电荷(物理) 水溶液 阴极 化学工程 纳米技术 化学物理 化学 物理化学 哲学 工程类 物理 认识论 冶金 量子力学
作者
Pascal Oberholzer,Elena Tervoort,Assil Bouzid,Alfredo Pasquarello,Dipan Kundu
出处
期刊:ACS Applied Materials & Interfaces [American Chemical Society]
卷期号:11 (1): 674-682 被引量:245
标识
DOI:10.1021/acsami.8b16284
摘要

Aqueous Zn-ion batteries, which are being proposed as large-scale energy storage solutions because of their unparalleled safety and cost advantage, are composed of a positive host (cathode) material, a metallic zinc anode, and a mildly acidic aqueous electrolyte (pH ≈ 3-7). Typically, the charge storage mechanism is believed to be reversible Zn2+ (de)intercalation in the cathode host, with the exception of α-MnO2, for which multiple vastly different and contradicting mechanisms have been proposed. However, our present study, combining electrochemical, operando X-ray diffraction, electron microscopy in conjunction with energy-dispersive X-ray spectroscopy, and in situ pH evolution analyses on two oxide hosts-tunneled α-MnO2 and layered V3O7·H2O vis-à-vis two nonoxide hosts-layered VS2 and tunneled Zn3[Fe(CN)6]2, suggests that oxides and nonoxides follow two dissimilar charge storage mechanisms. While the oxides behave as dominant proton intercalation materials, the nonoxides undergo exclusive zinc intercalation. Stabilization of H+ on the hydroxyl-terminated oxide surface is revealed to facilitate the proton intercalation by a preliminary molecular dynamics simulation study. Proton intercalation for both oxides leads to the precipitation of layered double hydroxide (LDH)-Zn4SO4(OH)6·5H2O with a ZnSO4/H2O electrolyte and a triflate anion (CF3SO3-)-based LDH with a Zn(SO3CF3)2/H2O electrolyte-on the electrode surface. The LDH precipitation buffers the pH of the electrolytes to a mildly acidic value, sustaining the proton intercalation to deliver large specific capacities for the oxides. Moreover, we also show that the stability of the LDH precipitate is crucial for the rechargeability of the oxide cathodes, revealing a critical link between the charge storage mechanism and the performance of the oxide hosts in aqueous zinc batteries.
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
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
1秒前
二十八画生完成签到 ,获得积分10
1秒前
琪琪应助沉默的傲采纳,获得10
1秒前
2秒前
2秒前
lulu完成签到,获得积分10
2秒前
光亮尔槐发布了新的文献求助10
2秒前
充电宝应助wxy采纳,获得10
2秒前
盛夏细闻完成签到 ,获得积分10
3秒前
wuli凯凯啊发布了新的文献求助10
3秒前
3秒前
jiahuo1完成签到,获得积分10
4秒前
4秒前
4秒前
D33sama完成签到,获得积分10
4秒前
4秒前
我是老大应助bb采纳,获得10
5秒前
bybyby完成签到,获得积分10
5秒前
嗯哼大王完成签到,获得积分10
5秒前
任ren完成签到,获得积分10
6秒前
6秒前
6秒前
zbw完成签到,获得积分20
6秒前
量子发布了新的文献求助10
7秒前
7秒前
热心芷烟发布了新的文献求助10
7秒前
Adi完成签到,获得积分10
8秒前
8秒前
ding应助bybyby采纳,获得10
9秒前
9秒前
9秒前
默默的橘子完成签到 ,获得积分10
10秒前
11秒前
11秒前
聪明凉面完成签到,获得积分20
12秒前
xxx应助苏栀采纳,获得10
12秒前
小艺艺发布了新的文献求助10
12秒前
齐静春发布了新的文献求助10
12秒前
guohezu发布了新的文献求助10
12秒前
桃子粥发布了新的文献求助10
13秒前
高分求助中
Classics in Total Synthesis IV: New Targets, Strategies, Methods 1000
Les Mantodea de Guyane 800
Mantids of the euro-mediterranean area 700
The Oxford Handbook of Educational Psychology 600
Development and Industrialization of Stereoregular Polynorbornenes 500
有EBL数据库的大佬进 Matrix Mathematics 500
Plate Tectonics 500
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 内科学 物理 纳米技术 计算机科学 基因 遗传学 化学工程 复合材料 免疫学 物理化学 细胞生物学 催化作用 病理
热门帖子
关注 科研通微信公众号,转发送积分 3418479
求助须知:如何正确求助?哪些是违规求助? 3020002
关于积分的说明 8890091
捐赠科研通 2707376
什么是DOI,文献DOI怎么找? 1484773
科研通“疑难数据库(出版商)”最低求助积分说明 686142
邀请新用户注册赠送积分活动 681347