HPA COATED SILICON ANODES: A PIONEERING DISCOVERY
Silicon (Si) is a very promising material for Li-battery anodes and has a significant advantage over graphite as it theoretically has ten times the energy capacity compared to graphite. Unfortunately, the Si particles expand to nearly 300% when charged, leading to particle fracture and subsequent separation of the anode from the copper collector.
In 2021, Altech Chemicals announced a ground-breaking discovery in its testing lab in Perth, Western Australia, where they had developed a lithium-ion battery that contains a composite graphite-silicon anode. They achieved this by treating silicon particles with high purity alumina and combining it with standard battery-grade graphite. This technology may well be a game-changer in the Li-ion battery market, as it can improve a battery’s energy density, lifespan and reduce first cycle lithium loss.
When asked about this innovative industry change, Iggy Tan, the CEO stated, “We have finally cracked the silicon code and have successfully produced lithium-ion batteries with 30% higher energy density…and this is significant for the lithium battery market and the potential electric vehicle market.”
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