A University of Wisconsin–Madison chemistry professor has come up with a new and more sustainable way to make silicon at much lower temperatures for the kind of advanced batteries used in electronics such as phones, cameras and laptop computers.
Despite its long history in development, silicon, the second most abundant element on earth, has only recently started gaining traction in the battery industry as an anode material.
But, in a solid state battery, the ions on the surface of the silicon are constricted and undergo the dynamic process of lithiation to form lithium metal plating around the core of silicon. “In our design, lithium metal gets wrapped around the silicon particle, like a hard chocolate shell around a hazelnut core in a chocolate truffle,” said Li.
A patent entitled “Large-format battery anodes comprising silicon particles” was transferred from Colorado-based startup SiLion to Tesla in October 2021 and hints at the utilization of a conductive polymer coating to stabilize the silicon . Figure 1. The major IP players in different segments of batteries with silicon-based anodes .
Silicon promises longer-range, faster-charging and more-affordable EVs than those whose batteries feature today’s graphite anodes. It not only soaks up more lithium ions, it also shuttles them across the battery’s membrane faster. And as the most abundant metal in Earth’s crust, it should be cheaper and less susceptible to supply-chain issues.
A solid-state silicon battery or silicon-anode all-solid-state battery is a type of rechargeable lithium-ion battery consisting of a solid electrolyte, solid cathode, and silicon-based solid anode. In solid-state silicon batteries, lithium ions travel through a solid electrolyte from a positive cathode to a negative silicon anode.
The Battery Revolution Is Finally Here
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New technique could slash energy use in making silicon
A University of Wisconsin–Madison chemistry professor has come up with a new and more sustainable way to make silicon at much lower temperatures for the kind of advanced batteries used in electronics such as …
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Will Silicon-Based Anode Technology Take the Crown as the …
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Lithium–silicon battery
OverviewHistorySilicon swellingCharged silicon reactivitySolid electrolyte interphase layerSee also
The first laboratory experiments with lithium-silicon materials took place in the early to mid 1970s. Silicon carbon composite anodes were first reported in 2002 by Yoshio. Studies of these composite materials have shown that the capacities are a weighted average of the two end members (graphite and silicon). On cycling, electronic isolation of the silicon particles tends to occur with the capacity falling off to the capacity of the graphite component. This effect has bee…
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Solid-state silicon battery
This technology uses sulfate solid-state electrolytes (SSE) to stabilize and allow for the use of a 99.9% weight μSi anode. This limits the volumetric changes of the silicon anode during lithiation and lithium dendrite growth. The cathode is lithium nickel cobalt manganese oxide. The use of a solid-state electrolyte reduces the contact of the ...
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Solid state battery design charges in minutes, lasts for thousands …
The company has scaled up the technology to build a smart phone-sized pouch cell battery. Li and his team also characterized the properties that allow silicon to constrict the diffusion of lithium to facilitate the dynamic process favoring homogeneous plating of thick lithium.
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While a graphite anode works by intercalating lithium into the interstices between the layer structure, a silicon anode reacts with lithium via intermetallic alloying, which gives silicon the potential to store ten times more lithium than graphite for a 30% increase in the energy density of the cell.
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New technique could slash energy use in making silicon
A University of Wisconsin–Madison chemistry professor has come up with a new and more sustainable way to make silicon at much lower temperatures for the kind of advanced batteries used in electronics such as phones, cameras and laptop computers.
Learn More
Lithium–silicon battery
Lithium–silicon batteries are lithium-ion batteries that employ a silicon-based anode, and lithium ions as the charge carriers. [1] Silicon based materials, generally, have a much larger specific capacity, for example, 3600 mAh/g for pristine silicon. [2]
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Solid-state silicon battery
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Solid state battery design charges in minutes, lasts for thousands …
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Silicon nanoparticles and nanostructures are important technologies used today to make silicon into batteries. These technologies aim to address the challenges associated with using silicon as an anode material in lithium-ion batteries (LIBs). Silicon has a high theoretical specific capacity and low working potential, making it a ...
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