Na2SnO3 functions as outstanding magnesium alloy passivator by synergistic effect with trace carboxymethyl chitosan for Mg-air batteries for standby protection

doi:10.1039/d1nj04940b

IOCAS-IR

	Na2SnO3 functions as outstanding magnesium alloy passivator by synergistic effect with trace carboxymethyl chitosan for Mg-air batteries for standby protection
	Chen, Liangyuan 1,2,3; Ma, Xiumin 1,2,3; Ma, Zheng 1,2,3; Lu, Dongzhu 1,2,3; Hou, Baorong 1,2,3
	2021-12-17
发表期刊	NEW JOURNAL OF CHEMISTRY
ISSN	1144-0546
页码	23
通讯作者	Ma, Zheng(xma@qdio.ac.cn)
摘要	Different concentrations of sodium stannate (Na2SnO3) (0.2, 0.5, 2.0, and 5.0 mM) as well as their mixture with trace amount of carboxymethyl chitosan (CMCS) (0.1 mM) are selected as the electrolyte additive for the AZ61 alloy in 3.5 wt% NaCl electrolyte in this study. The corrosion inhibition and oxide film activation (during discharging) effect on the AZ61 alloy are evaluated by weight loss measurement, hydrogen evolution test, potentiodynamic polarization measurement, electrochemical impedance spectroscopy measurement, and half-cell investigations. These tests show that Na2SnO3 acts as a passivation inhibitor, CMCS acts as a cathodic type inhibitor, the maximum value of IE% can be easily boosted to higher levels by adding the mixed inhibitors, as compared to that by adding single Na2SnO3. Also, the addition of the mixed inhibitors subject the AZ61 anode to relatively high utilization efficiency, specific capacity, and energy density at the constant current density (10 and 40 mA cm(-2)), hardly affecting the discharge potential in 3.5 wt% NaCl solution. Their possible inhibition/activation mechanism are discussed by a series of surface analysis methods. These analyses suggest that the added Na2SnO3 can promote the deposition of metal hydroxides over the whole surface of the product film including breaking areas, and the formation of the Mg(OH)(2) product film rich in MgSn(OH)(6). For the mixed inhibitors, CMCS molecules are physically adsorbed on the alloy surface as well as the subsequent initial product film; then, part of the physiosorbed CMCS molecules are changed to the chemisorbed CMCS molecules, forming the Mg-CMCS interface film, as well as Mg(OH)(2)-CMCS and MgSn(OH)(6)-CMCS composite product film, whereas most of the physiosorbed CMCS molecules may also play the role of a protective shield role due to its planar structure. During the discharge process with the addition of Na2SnO3, the inability to form stable attachment of the discharge product layer due to the chunk effect, the lack of Mg(OH)(2) structural basis for product layer, and friction action between the MgSnO3/MgSn(OH)(6) particles carried by flowing liquid and the anode surface. Overall, the mixed inhibitors as additives in the NaCl electrolyte (3.5 wt%) of the Mg-air batteries using the AZ61 anode can play a role in standby protection and improving the utilization efficiency during the no-discharge and discharge periods.
DOI	10.1039/d1nj04940b
收录类别	SCI
语种	英语
资助项目	Science and Technology Research of China Railway[N2019G013] ; Chinese Academy of Engineering[2020-XZ-25]
WOS研究方向	Chemistry
WOS类目	Chemistry, Multidisciplinary
WOS记录号	WOS:000740747200001
出版者	ROYAL SOC CHEMISTRY
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/177666
专题	中国科学院海洋研究所
通讯作者	Ma, Zheng
作者单位	1.Chinese Acad Sci, Inst Oceanol, 7 Nanhai Rd, Qingdao 266071, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol Qingdao, Open Studio Marine Corros & Protect, 1 Wenhai Rd, Qingdao 266200, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Mega Sci, 7 Nanhai Rd, Qingdao 266071, Peoples R China
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Chen, Liangyuan,Ma, Xiumin,Ma, Zheng,et al. Na2SnO3 functions as outstanding magnesium alloy passivator by synergistic effect with trace carboxymethyl chitosan for Mg-air batteries for standby protection[J]. NEW JOURNAL OF CHEMISTRY,2021:23.
APA	Chen, Liangyuan,Ma, Xiumin,Ma, Zheng,Lu, Dongzhu,&Hou, Baorong.(2021).Na2SnO3 functions as outstanding magnesium alloy passivator by synergistic effect with trace carboxymethyl chitosan for Mg-air batteries for standby protection.NEW JOURNAL OF CHEMISTRY,23.
MLA	Chen, Liangyuan,et al."Na2SnO3 functions as outstanding magnesium alloy passivator by synergistic effect with trace carboxymethyl chitosan for Mg-air batteries for standby protection".NEW JOURNAL OF CHEMISTRY (2021):23.

条目包含的文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
d1nj04940b.pdf（8430KB）	期刊论文	出版稿	限制开放	CC BY-NC-SA	浏览