![]() ![]() The battery uses a new technology that prevents dendrite formation in the lithium-metal anodes. “We have achieved in the lab 5,000 to 10,000 charge cycles in a battery’s lifetime, compared with 2,000 to 3,000 charging cycles for even the best in class now, and we don’t see any fundamental limit to scaling up our battery technology. “We set out to commercialize this technology because we do see our technology as unique compared to other solid-state batteries,” said Xin Li, Associate Professor of Materials Science at Harvard and scientific advisor to Adden Energy. Still, Adden wants to scale the battery up to a palm-sized pouch cell and further to a full-scale EV battery. The coin-cell prototypes developed by Adden Energy for lab testing don’t look like much now. Based on lithium-metal technology, the battery can achieve charge rates as fast as three minutes with over 10,000 cycles in a lifetime. Our recent study shows that this feature can also be maintained at scale-up.The startup uses an exclusive technology license from Harvard’s Office of Technology Development to develop solid-state battery systems for use in future electric vehicles. “As a result, the device can sustain its high performance over a long lifetime. “We defeat the growth of dendrites before they can cause damage, by novel structural and material designs,” said Ye, who is now CTO of Adden Energy. We have achieved in the lab 5,000 to 10,000 charge cycles in a battery’s lifetime, compared with 2,000 to 3,000 charging cycles for the best in class now, and we don’t see any fundamental limit to scaling up our battery technology.” Li, who is a scientific advisor to Adden Energy, stated “ We see our technology as unique compared to other solid-state batteries. The startup will work to scale the battery up to a palm-sized pouch cell, and then upward toward a full-scale vehicle battery in the next three to five years. ![]() Fred Hu, founder and Chairman of Primavera Capital, is also a founder of Adden Energy. Adden Energy was co-founded in 2021 by Li, along with William Fitzhugh, and Luhan Ye, both of whom contributed to the development of the technology as graduate students in Li’s Harvard lab. It also boasts high energy density and a level of material stability that overcomes the safety challenges posed by some other lithium batteries. Their lab-scale coin-cell prototype has achieved battery charge rates as fast as three minutes with over 10,000 cycles in a lifetime. Paulson School of Engineering and Applied Sciences (SEAS). The technology was developed by researchers in the lab of Xin Li, PhD, Associate Professor of Materials Science at Harvard John A. The license and the venture funding will allow the startup to work on scal ing up Harvard’s laboratory prototype for commercial deployment of a solid-state lithium-metal battery. The company has just received seed of $5.15M. Adden Energy is a startup founded to develop solid-state battery systems for use in the next generations of EVs. The exclusive license was granted by Harvard’s Office of Technology Development. The latest of these is Startup Adden Energy, who have been granted a technology license from Harvard to scale lithium-metal battery technology for commercial deployment. M any other organizations are also looking to make advances developing solid-state batteries knowing that success will be highly profitable. For example, both Ford and BMW have invested in Solid Power, a Colorado-based battery start-up, and VW is the largest shareholder in QuantumScape Corporation. ![]() Vehicle manufacturers are fully committed to solid-state batteries and are either trying to advance the technology themselves, or pouring money into companies that are developing it. If that could be overcome, and some manufacturing problems ironed out, then solid-state batteries would be quickly integrated into EVs and uptake would be even quicker. ![]() Unfortunately, the problems get worse the faster that the battery is charged, an obvious downside for EVs. Dendrites are slim strips of metal that grow between the electrodes and eventually cause the battery to short circuit. This is because they form dendrites easily. The problem is that their performance tends to degrade quickly and they are therefore capable of far less charge and discharge cycles. They also tend to be more power dense, storing more energy in less space. The time it takes them to c h arge can be measured in minutes, rather than hours, and because they don’t have a liquid electrolyte, they are much safer and far less prone to bursting into flame s. Solid-state batteries offer all the upsides of the Li-ion batteries that electric vehicles use, but have much fewer downsides. ![]()
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