Sodium Battery Is Capable of Rapid Charging in Just a Few Seconds

The innovative hybrid energy storage system integrates anode materials typically used in batteries with cathodes suitable for supercapacitors.

August 1, 2024

Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea

Electrochemical characterizations of FS/C/G-20//ZDPC SIHES full cells (left). Ragone plots for FS/C/G-20//ZDPC (this work) and other previously reported sodium-ion electrochemical energy storage devices (right). (Image: Korea Advanced Institute of Science and Technology)

Sodium (Na), which is over 500 times more abundant than lithium (Li), has recently garnered significant attention for its potential in sodium-ion battery technologies. However, existing sodium-ion batteries face fundamental limitations, including lower power output, constrained storage properties, and longer charging times, necessitating the development of next-generation energy storage materials.

Korea Advanced Institute of Science and Technology (KAIST) has announced that a research team led by Professor Jeung Ku Kang from the Department of Materials Science and Engineering developed a high-energy, high-power hybrid sodium-ion battery capable of rapid charging.

The innovative hybrid energy storage system integrates anode materials typically used in batteries with cathodes suitable for supercapacitors. This combination allows the device to achieve both high storage capacities and rapid charge-discharge rates, positioning it as a viable next-generation alternative to lithium-ion batteries.

However, the development of a hybrid battery with high energy and high power density requires an improvement to the slow energy storage rate of battery-type anodes as well as an enhancement of the relatively low capacity of supercapacitor-type cathode materials.

To account for this, Professor Kang’s team utilized two distinct metal-organic frameworks for the optimized synthesis of hybrid batteries. This approach led to the development of an anode material with improved kinetics through the inclusion of fine active materials in porous carbon derived from metal-organic frameworks. Additionally, a high-capacity cathode material was synthesized, and the combination of the cathode and anode materials allowed for the development of a sodium-ion storage system optimizing the balance and minimizing the disparities in energy storage rates between the electrodes.

The assembled full cell, comprising the newly developed anode and cathode, forms a high-performance hybrid sodium-ion energy storage device. This device surpasses the energy density of commercial lithium-ion batteries and exhibits the characteristics of supercapacitors’ power density. It is expected to be suitable for rapid charging applications ranging from electric vehicles to smart electronic devices and aerospace technologies.

Professor Kang noted that the hybrid sodium-ion energy storage device, capable of rapid charging and achieving an energy density of 247 Wh/kg and a power density of 34,748 W/kg, represents a breakthrough in overcoming the limitations of energy storage systems. He anticipates broader applications across various electronic devices, including electric vehicles.

For more information, contact Yoonju Hong at This email address is being protected from spambots. You need JavaScript enabled to view it.; +82 42-350-2294.