What you need to know
- Lithium-metal anode batteries are considered the “holy grail” of portable storage, owing to their huge potential for storing energy, their affordability, and recyclability when compared to traditional batteries.
- The primary problem has always been their reactivity. Lithium-metal anode batteries essentially are a bit explodey.
- Research has been going on for decades to resolve the practicality issues around lithium-metal anode batteries, and a new breakthrough may be the first step to practical applications.
- A stable lithium-metal anode battery could charge your Windows laptop in mere minutes, and stave off degradation for thousands of cycles, potentially lasting decades.
New research published this week might be the first step towards practical applications of lithium-metal anode batteries — considered by many to be the “holy grail” of portable electricity storage. Lithium-metal anode batteries sport numerous advantages over today’s modern batteries, notably when it comes to recharging, capacity, and longevity across cycles. Batteries and electricity storage is a huge area of research across the globe right now, as its one of the last areas for improvements in consumer tech, but also a huge component of electric vehicles, carbon-zero renewable energy grids, sustainable aviation, and beyond. For all the advantages lithium-metal anode batteries have, there is a fairly noteworthy disadvantage — they have a tendency to, well, explode. These batteries are incredibly reactive to water, air, and basically anything, making them wholly unsafe and unpractical for pretty much all applications. That is, potentially, until now. New research (via The Independent) emerging from Harvard School of Engineering and Applied Sciences (SEAS) in the United States may have solved at least some of the lithium-metal anode issues, pertaining to general reactivity. “Lithium metal anode batteries are considered the holy grail of batteries,” said Xin Li, associate professor at SEAS, “because they have 10 times the capacity of commercial graphite anodes and could drastically increase the driving distance of electric vehicles. Our research is an important step toward more practical solid state batteries for industrial and commercial applications.” Li used a chocolate truffle analogy to describe how their tech works. Lithium metal is wrapped around silicon particles, “like a hard chocolate shell around a hazelnut core in a chocolate truffle.” By placing micron-sized silicon particles inside the battery’s anode, Li and the team at SEAS discovered that it mitigates the so-called “plating” effect, which is what contributes to lithium-metal anode battery’s unstable nature. As a result, their postage stamp-sized solid state battery prototypes were able to retain 80 per cent of their capacities after over 6,000 cycles. Li and his team published their research in Nature this past week, although further exploration of the interactivity between the lithium and their novel silicon solution may be needed before full-blown commercialization.
