Harvard Develops Solid State Battery Tech That Recharges In Minutes!

The researchers from the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) made significant advancements in lithium metal batteries after developing a new solid state battery that can be fully recharged in 10 minutes.

The research was published by Xin Li, Associate Professor of Materials Science at SEAS, and co-authored by Luhan Ye, Yang Lu, Yichao Wang, and Jianyuan Li. Their findings could prove to be an industry game changer if it can be made viable for mass production, especially in the automotive space.

The newly developed solid state battery would need to have:

Exceptional Cycle Life: The developed lithium metal battery can be charged and discharged at least 6,000 times, surpassing the performance of other pouch battery cells. This extended life cycle is a crucial feature for applications like electric vehicles, where durability and longevity are paramount.

Quick Recharge: The battery can be recharged in a matter of minutes, providing a fast-charging capability. This is particularly important for electric vehicles, where reducing charging times enhances user convenience and promotes wider adoption.

Lithium Metal Anode: Lithium metal anodes are considered highly desirable in battery tech due to their tenfold capacity compared to commercial graphite anodes. The research aims to overcome challenges associated with lithium metal anodes, such as dendrite formation.

Dendrite Suppression: One of the primary challenges addressed in this research is the formation of dendrites on the surface of the lithium metal anode. Dendrites can pierce the barrier between the anode and cathode, leading to short circuits or even fires. Researchers tackled this by using micron-sized silicon particles in the anode to constrict the lithiation reaction and prevent dendrite growth.

Multilayer Design: The team previously proposed a multilayer battery design to control and contain dendrites. In their current research, silicon particles were used to further enhance dendrite suppression.

Homogeneous Plating: By constricting the lithiation reaction at the shallow surface, the battery achieves homogeneous plating of a thick layer of lithium metal. This design prevents uneven plating and facilitates smoother plating and stripping, enabling rapid recharge.

Industrial and Commercial Applications: The research is deemed a crucial step towards practical solid-state batteries for industrial and commercial applications. Solid-state batteries offer potential improvements in safety, energy density, and performance compared to traditional lithium-ion batteries.

Material Characterisation: The researchers characterised the properties of silicon that enable dendrite suppression. They introduced a unique property descriptor and identified several other materials with similar characteristics, opening up possibilities for exploring alternative materials in battery design.

Scaling Up: The tech has been licensed to Adden Energy, a Harvard spinoff company, which has scaled up the tech to build a smartphone-sized pouch cell battery. This suggests the potential for real-world applications and commercialization of the developed battery technology.

To sum things up, the Harvard SEAS research represents a significant advancement in lithium metal battery tech. It could pave the way for more practical and efficient solid-state batteries with potential applications in a variety of industries, most notably electric vehicles and portable electronics.

The ability to mass-produce these batteries at a lower cost than lithium-ion batteries would be a game changer as it could lower the cost of electric vehicle production.