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HKUST researchers develop high-density silver-additive battery
Researchers at the Hong Kong University of Science and Technology (HKUST) have developed an anode-free lithium metal battery achieving an energy density of 467 Wh/kg. The technology, published in Nature Communications, utilizes a multifunctional additive containing silver ions (AMI) within the electrolyte to address common stability issues.
In this “anode-free” architecture, the negative electrode consists only of a copper current collector. During charging, lithium deposits onto the copper. The silver-based additive facilitates uniform lithium deposition and strengthens the solid electrolyte interphase (SEI) layer, preventing the formation of dendrites that cause short circuits. In testing, a button cell retained 90% of its capacity after 200 cycles.
This energy density represents a significant increase over current standards. Compared to NCM cells used in most electric vehicles (250–300 Wh/kg), this technology offers 55% to 85% more energy per kilogram. For an 80 kWh battery, this could reduce cell weight from approximately 296 kg to 171 kg, a saving of 125 kg.
Entities
Hong Kong University of Science and Technology · Nature Communications · Shao Minhua
Claims
What the coverage asserts, and how many sources carry each claim.
- [○ 1 SOURCE] The technology could reduce the weight of an 80 kWh battery by 125 kg compared to NCM cells. testcoches.es
- [○ 1 SOURCE] A button cell retained 90% capacity after 200 cycles.
- [● 2 SOURCES] HKUST researchers developed an anode-free lithium metal battery with 467 Wh/kg energy density. testcoches.es
- [○ 1 SOURCE] The battery uses a silver-ion additive (AMI) in the electrolyte.
- [● 2 SOURCES] The anode-free architecture uses a copper current collector instead of a graphite anode. testcoches.es