신소재공학과

Research Highlight

KAIST Develops Sodium Ion Batteries using Copper Sulfide 이미지1
(Dr. Sungjoo Kim, PhD candidates Hyeon Kook Seo, Jae Yeol Park and Joon Ha Chang, Emeritus Professor Jeong Yong Lee and Professor Jong Min Yuk)

A KAIST research team recently developed sodium ion batteries using copper sulfide anode. This finding will contribute to advancing the commercialization of sodium ion batteries (SIBs) and reducing the production cost of any electronic products with batteries.

Professor Jong Min Yuk and Emeritus Professor Jeong Yong Lee from Department of Materials Science and Engineering succeeded in developing a new anode material suitable for use in a SIB. Compared to the existing anode materials, the copper sulfide anode was measured to exhibit 1.5 times better cyclability with projected 40% reduction in cost.

Batteries used in various applications including mobile phones are lithium ion batteries, mostly referred as Li-ion batteries or LIBs. Though they are popularly used until now, large-scale energy storage systems require much inexpensive and abundant materials. Hence, a SIB has attracted enormous attention for their advantage over a lithium counterpart.

However, one main obstacle to commercialization of SIB is the lack of suitable anodes that exhibit high capacity and the cycling stability of the battery. Hence, the research team recognized this need for a good anode material that could offer high electrical conductivity and theoretical capacity. The material was found to be copper sulfide, preferably in nanoplates, which “prefers to make an alloy with sodium and is thus promising for high capacity and long-term cyclability.”

Further analysis presented in the study reveals that copper sulfide undergoes crystallographic tuning to make a room for sodium insertion. Results indicate that the sodium ion-insertion capacity of copper sulfide is as much as 1.5 times that of lithium ions for graphite. Furthermore, a battery with this new anode material retains 90% of its original capacity for 250 charge-discharge cycles.

With the natural abundance of sodium in seawater, this development may contribute to reduction in battery costs, which can be translated into up to 30% cut in the price of various consumer electronics. 

Professor Lee expressed his hope for “the production of next-generation, high-performance sodium ion batteries”. 

Professor Yuk said, “These days, people are showing a great deal of interest in products related to renewable energy due to recent micro-dust issues ongoing in Korea. This study may help Korea get a head-start on renewable energy products”.

This research, led by PhD candidate Jae Yeol Park and Dr. Sung Joo Kim, was published online in Nature Communications on March 2. 

Figure 1. The sodiation process of copper sulfide
KAIST Develops Sodium Ion Batteries using Copper Sulfide 이미지2

No. Subject Author Date Views
Notice Flexible Drug Delivery Microdevice to Advance Precision Medicine ADMINI 2018.08.14 41
Notice A New Efficient Oxide Coating Technology to Improve Fuel Cells ADMINI 2018.08.03 142
Notice A High-Performance and Cost Effective Hydrogen Sensor ADMINI 2018.08.03 97
Notice KAIST Team Develops Flexible Blue Vertical Micro LEDs ADMINI 2018.06.26 326
Notice Platinum Catalyst Has Price Lowed and Durability Doubled ADMINI 2018.06.26 372
Notice Capillary Forces at Work for Lithium-Sulfur Batteries ADMINI 2018.06.26 325
Notice New Material for Generating Energy-Efficient Spin Currents ADMINI 2018.06.26 316
37 Low-power, Flexible Memristor Circuit for Mobile and Wearable Devices ADMINI 2018.06.26 297
» KAIST Develops Sodium Ion Batteries using Copper Sulfide ADMINI 2018.04.24 1015
35 Researchers develop flexible vertical micro LED file ADMINI 2018.02.07 1129
34 Lifespan of Fuel Cells Maximized using Small Amount of Metals file ADMINI 2018.01.21 1133
33 A New Spin Current Generating Material Developed file ADMINI 2017.12.21 1305
32 Professor Kim Sang Ouk of KAIST participated in editorship of GRAPHIN NEW MATERIALS file ADMINI 2017.10.23 1668
31 Pd nanowire array-based ultra-fast hydrogen gas sensor by using engineered nanofiltration of metal-organic framework file ADMINI 2017.09.27 1822
30 7 nanometer Semiconductor Manufacturing Technology with Camera Flash file ADMINI 2017.09.14 1906
29 Development of disease diagnjosis sensor using animal protein catalyst file ADMINI 2017.07.20 2059
28 Making Graphene Using Laser-induced Phase Separation file ADMINI 2016.12.07 4484
27 Hyper-stretchable elastic piezoelectric energy harvester file ADMINI 2015.04.29 9587
26 “Nature Materials” News & Views wrote by Prof. Sang Ouk Kim file admin 2015.02.17 11634
25 Academic Achievements & Related Awards file admin 2015.02.17 9199