Electrodeposition of Silicon with a Liquid Gallium Cathode in Molten Salts

阴极 材料科学 电解 电解质 阳极 冶金 无机化学 电极 化学 物理化学
作者
Geir Martin Haarberg,Tomonori Kato,Yutaro Norikawa,Toshiyuki Nohira
出处
期刊:Meeting abstracts 卷期号:MA2019-01 (46): 2247-2247
标识
DOI:10.1149/ma2019-01/46/2247
摘要

Further development of solar power depends largely on the availability of inexpensive solar grade silicon. Electrodeposition is a candidate method to produce high purity silicon at a reasonable cost. We have previously studied electrodeposition of silicon from molten calcium chloride based electrolytes and molten fluoride electrolytes. Recent experiments were carried out by using a liquid gallium cathode. The approach is based on studies by Stephen Maldonado and coworkers [1] of electrodeposition of silicon by using a liquid gallium cathode in an organic based electrolyte. Silicon has a low tendency to alloy with gallium. Electrochemical studies and electrolysis to deposit silicon from molten eutectic KCl – KF with 2 mol% K 2 SiF 6 were carried out at 650 o C. Silver wire and glassy carbon rod were used as working electrodes, while glassy carbon rod or silver wire were counter electrodes. A silicon flag reference electrode was used. Liquid gallium in a small alumina tube with tungsten lead was the cathode during electrolysis while glassy carbon or silicon was the anode. Silicon deposition is diffusion controlled on silver cathode, while silicon deposition is charge transfer controlled on liquid gallium cathode. Silicon was found to deposit using a liquid gallium cathode, both during galvanostatic and potentiostatic electrolysis. The current efficiency was found to be quite high, and consistently above 80 %. Some silicon particles were found on top of gallium after cooling down. A much larger amount of gallium was used in recent experiments. This helped to form silicon particles inside the liquid gallium cathode. Silicon was recovered after experiments by physical separation from liquid gallium followed by dissolution of gallium in concentrated HNO 3 . High purity silicon was obtained. Gallium can form alloys with many impurity elements which may cause a refining effect of silicon. The use of a liquid gallium cathode is promising for the prospect of developing a new process for producing high purity silicon by electrolysis in molten salts. References 1. L. Ma, S. Lee, J. DeMuth, and S. Maldonado, Direct electrochemical deposition of crystalline silicon nanowires at T ≥ 60 o C, RSC Adv. , 6, 78818 (2016).

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
dm11完成签到 ,获得积分10
刚刚
Akim应助靖123456采纳,获得10
1秒前
yizhe完成签到,获得积分10
1秒前
畅畅完成签到 ,获得积分10
1秒前
ChatGPT发布了新的文献求助10
2秒前
李健的小迷弟应助la采纳,获得10
2秒前
ZYN完成签到 ,获得积分10
3秒前
Mason完成签到,获得积分10
4秒前
yizhe发布了新的文献求助10
4秒前
JamesPei应助zzzz采纳,获得10
5秒前
英俊的铭应助aa采纳,获得30
5秒前
xiaohuhuan完成签到,获得积分10
5秒前
bulingbuling完成签到 ,获得积分10
6秒前
一颗小纽扣完成签到,获得积分10
7秒前
席涑完成签到,获得积分10
8秒前
CipherSage应助拼搏的婷冉采纳,获得10
8秒前
luoluo完成签到 ,获得积分10
9秒前
9秒前
醋炒栗子仁完成签到,获得积分10
9秒前
墨尔根戴青完成签到,获得积分10
10秒前
瑾瑜完成签到,获得积分10
11秒前
文小杰完成签到,获得积分10
11秒前
山月完成签到,获得积分10
12秒前
CodeCraft应助研友_LOK59L采纳,获得10
12秒前
12秒前
13秒前
欣慰妙海完成签到 ,获得积分20
13秒前
CodeCraft应助zhaopeipei采纳,获得10
13秒前
LIUYONG发布了新的文献求助10
14秒前
lin发布了新的文献求助10
16秒前
17秒前
九湖夷上完成签到 ,获得积分10
17秒前
噼里啪啦完成签到 ,获得积分10
18秒前
大个应助hahaha123213123采纳,获得30
18秒前
18秒前
惊天大幂幂完成签到,获得积分10
18秒前
英姑应助Fang Xianxin采纳,获得10
19秒前
宋老师发布了新的文献求助30
19秒前
王洋完成签到,获得积分10
20秒前
lw777完成签到,获得积分20
20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
Global Eyelash Assessment scale (GEA) 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 550
Research on Disturbance Rejection Control Algorithm for Aerial Operation Robots 500
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 4038388
求助须知:如何正确求助?哪些是违规求助? 3576106
关于积分的说明 11374447
捐赠科研通 3305798
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