NDLI: A long-life rechargeable Al ion battery based on molten salts

Content Provider	Royal Society of Chemistry (RSC)
Author	Wang, Junxiang Jiao, Handong Tu, Jiguo Mao, Xuhui Fray, Derek J. Liu, Yingjun Jiao, Shuqiang Song, Yang Guo, Zhancheng
Copyright Year	2017
Abstract	Affordable and scalable energy storage systems are necessary to mitigate the output fluctuation of an electrical power grid integrating intermittent renewable energy sources. Conventional battery technologies are unable to meet the demanding low-cost and long-life span requirements of a grid-scale application, although some of them demonstrated impressive high energy density and capacity. More recently, the prototype of an Al-ion battery has been developed using cheap electrode materials (Al and graphite) in an organic room-temperature ionic liquid electrolyte. Here we implement a different Al-ion battery in an inorganic molten salt electrolyte, which contains only an extremely low-cost and nonflammable sodium chloroaluminate melt working at 120 °C. Due to the superior ionic conductivity of the melt electrolyte and the enhanced Al-ion interaction/deintercalation dynamics at an elevated temperature of 120 °C, the battery delivered a discharge capacity of 190 mA h g−1 at a current density of 100 mA g−1 and showed an excellent cyclic performance even at an extremely high current density of 4000 mA g−1: 60 mA h g−1 capacity after 5000 cycles and 43 mA h g−1 capacity after 9000 cycles, with a coulombic efficiency constantly higher than 99%. The low-cost and safe characteristics, as well as the outstanding long-term cycling capability at high current densities allow the scale-up of this brand-new battery for large-scale energy storage applications.
Starting Page	1282
Ending Page	1291
Page Count	10
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	5
Issue Number	3
Journal	Journal of Materials Chemistry A
DOI	10.1039/c6ta09829k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Renewable energy Energy density Electrode Graphite Ionic liquid Electrolyte Molten salt Sodium Electric current
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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