Premium Only Content

High-performance aqueous calcium-ion battery
Researchers from Rensselaer Polytechnic Institute in the United States have developed a special class of materials for bulky calcium ions, providing pathways for their facile insertion into battery electrodes.
AUGUST 5, 2022 MARIJA MAISCH
Against a backdrop of soaring prices and predicted shortfalls of lithium-ion battery materials, the search for inexpensive, abundant, safe, and sustainable battery chemistries has never been more critical. Calcium has been considered in batteries, but the larger size and higher charge density of its ions, relative to lithium, have posed challenges for their insertion into electrode materials.
Now, researchers from Rensselaer Polytechnic Institute in the United States have reported progress in addressing this issue and unlocking the potential of high-performing calcium-ion batteries.
“The calcium ion is divalent, and hence one ion insertion will deliver two electrons per ion during battery operation,” said Nikhil Koratkar, the John A. Clark and Edward T. Crossan Professor of Engineering at Rensselaer. “This allows for a highly efficient battery with reduced mass and volume of calcium ions.”
However, the larger size and higher charge density of calcium ions relative to lithium impair diffusion kinetics and cyclic stability, he added. The team has overcome this problem by developing oxide structures containing big open spaces (heptagonal and hexagonal channels). In their work, an aqueous calcium-ion battery is demonstrated using orthorhombic and trigonal polymorphs of molybdenum vanadium oxide (MoVO) as a host for calcium ions.
The researchers have demonstrated that calcium ions can be rapidly inserted and extracted from the material, with these tunnels acting as “conduits” for reversible and fast ion transport. The findings indicate that MoVO provides one of the best performances reported to date for the storage of calcium ions.
Specifically, for trigonal MoVO, a specific capacity of ∼203 mAh g−1 was obtained at 0.2C and at a 100 times faster rate of 20C, a ∼60 mAh g−1 capacity was achieved. The open-tunnel trigonal and orthorhombic polymorphs also promoted cyclic stability and reversibility. These findings were recently published in Proceedings of the National Academy of Sciences (PNAS).
“Calcium-ion batteries might one day, in the not-so-distant future, replace lithium-ion technology as the battery chemistry of choice that powers our society,” says Koratkar. “This work can lead of a new class of high-performing calcium-based batteries that use earth-abundant and safe materials and are therefore affordable and sustainable. Such batteries could find widespread use in portable and consumer electronics, electric vehicles, as well as grid and renewable energy storage.”
This content is protected by copyright and may not be reused. If you want to cooperate with us and would like to reuse some of our content, please contact editors@pv-magazine.com.
About us https://bit.ly/3GUPFOa
Contact us +919942258153 kvk.subadhra@gmail.com
https://546ba714te64e151xvugx-shmx.hop.clickbank.net
-
1:06:57
Winston Marshall
11 hours agoHow The West Enabled The Iran Axis to Grow Unchecked w/ Ambassador Michael Oren
83.6K33 -
LIVE
JdaDelete
12 hours ago $0.04 earnedDuke Nukem 3D | Sega Saturday
62 watching -
LIVE
Behunted
4 hours agoITS HOT HOT WARZONE MAYHEM !! PEW PEW
22 watching -
58:49
Tactical Advisor
3 hours agoUnboxing Tacpack/New 1854 Lever Action | Vault Room Live Stream 029
71.5K7 -
LIVE
Mossy
2 hours ago🔥RumbleCraftSMP🔥sesh time tap in🔥DUCKY IS ON??🔥#RumbleTakeover🔥
40 watching -
1:14:49
Mike Rowe
20 hours agoDavid Mamet Pulls No Punches When It Comes To Hollywood & Politics | #440 | The Way I Heard It
46.5K26 -
Beyond_Bitz
3 days agoMetal Gear Solid 2 - Part 4 - Finale
1.17K -
LIVE
ttvglamourx
4 hours ago $2.23 earnedPLAYING WITH VIEWERS !DISCORD
147 watching -
15:19
T-SPLY
18 hours agoMayor Busted: Nashville Mayor Not Concerned Over Leaking Federal Agents Information!
34.4K94 -
14:05
Mrgunsngear
5 hours ago $2.62 earnedHolosun 507 Comp Review: The Best Pistol Optic?
24.9K7