Soluble Lead Flow Battery (SLFB)
A safe, sustainable, affordable battery for stationary energy storage
Page last modified
May 7 2025
SoLead Energy aims to develop and manufacture the Soluble Lead Flow Battery (SLFB), aiding the transition to net zero by delivering a safe, recyclable solution for large-scale energy storage for stationary applications. Examples include integrating renewable generation such as solar and wind, i.e. using the battery to provide power when there is no solar or wind, then recharging when the wind starts blowing or the sun is shining. The SLFB stores energy in lead dissolved in a safe, non-flammable, water-based electrolyte. The system is completely circular, with materials that can be sourced from spent lead-acid batteries, and at end of life, it can be recycled using existing, scaled processes.
Pros & Limitations
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Safe, with a low risk of fire
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High recyclability
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Affordable. We use low cost and abundant materials in the construction of our battery
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Round-trip efficiency is 70-80% (compared with >90% for li-ion)
Specification
| Title | Description |
|---|---|
| Core Tech | Energy Storage/Battery |
| Industry | Energy Storage |
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Low-cost
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Aim for 1/2 Li-ion benchmark at GBP 50 kW/h
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Safe
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No thermal runaway
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Recyclable
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Fits in with existing lead acid recycling
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Energy density
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Improved land use vs Li-ion
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Long cycle life
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Undefined end of life with annual refreshing
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Efficiency
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Patent pending
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Technology Readiness Level
The Technology Readiness Level (TRL) indicates the maturity level of novel technologies. Learn more about the TRL scale used by us.
[4/9]
Development
Technology demonstration
Mature / Proven
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