LMFP chemistry: advantages, limitations and differences compared to LFP
17 June 2026
LMFP is one of the most discussed battery chemistries in the lithium sector today. It promises higher energy density while maintaining the advantages of LFP. But is this evolution truly ready for industrial applications? In this article, Alan Pastorelli, Co-founder and CTO of Flash Battery, analyzes the differences between LMFP and LFP, the advantages, potential trade-offs, and the current state of the market, using a test-based and industrial validation approach.
LMFP stands for lithium manganese iron phosphate, a variation of the traditional LFP chemistry.
The base structure remains lithium iron phosphate, with a percentage of manganese added.
This addition modifies some material properties without altering its original framework. The goal is not to revolutionize the chemistry, but to evolve a well-established base.
Manganese is introduced directly during cell manufacturing in variable percentages, chosen by producers depending on market applications. It is therefore not a parameter adjusted at system or battery pack level, but an intrinsic characteristic of the cell itself.
LMFP chemistry: how charge and discharge curves change
LMFP and LFP voltage curves: the higher voltage of LMFP highlights the potential increase in energy density [1]
LMFP also introduces different behavior in the charge and discharge curve, meaning how voltage changes depending on the state of charge.
Since the relationship between voltage and state of charge is a property of the chemistry, LMFP has its own specific curve.
This curve shows similarities with both LFP and NMC chemistries, in particular:
- Similar to NMC, it reaches high charge voltages up to 4.2V
- There is a region between 50% and 60% state of charge where voltage varies, while in other areas it remains flat like LFP
- Like LFP, it still has two flat operating zones where voltage does not vary
The high voltage it reaches enables higher energy density on one hand, but on the other it results in greater internal stress.
Naturally, each chemistry with a different curve requires dedicated control logic. There are no plug-and-play solutions, and the introduction of LMFP directly impacts:
• BMS algorithms
• state of charge (SoC) estimation
• overall battery management
In practice, integrating LMFP into a real system is not a simple operation: BMS algorithms must be redesigned from scratch, state-of-charge estimation requires new logic, and overall battery management must be adapted to the specific curve of this chemistry. There is no plug-and-play approach, and anyone claiming otherwise has likely not yet implemented it in the field.
The main advantage of LMFP is clear: more energy at the same volume.
This makes it interesting for all applications currently based on LFP where:
• space is a critical constraint
• a bit more autonomy is needed without increasing size
It is not a chemistry that opens completely new scenarios, but rather an incremental evolution that can make a difference in many electric vehicles, including automotive applications already based on LFP.
At the same time, Lmfp offers an additional opportunity to avoid resorting to NMC chemistries, which, while offering higher energy density, come with known drawbacks:
• lower safety
• shorter cycle life
• use of problematic and expensive materials such as cobalt and nickel.
Comparative chart of LFP, LMFP, and NMC battery chemistries in terms of safety, energy density, cycle life, and cost
Once the first LMFP cells are received, the process is the same we follow for every new technology.
1. Intrinsic safety verification
The first phase concerns safety:
• laboratory abuse testing
• fault simulation and thermal runaway tests
• temperature and energy release analysis
The goal is to verify that the key LFP principle is maintained:
no propagation, regardless of active safety systems or external intervention.
2. Real-world usage testing
The next step is performance-related:
• cycling tests
• thermal tests
• realistic usage profiles
We do not rely solely on supplier data: we replicate our own use cases, often more demanding or simply different from standard ones. Applications with continuous and intensive cycles, such as those developed for E80 Group, are a concrete example.
LMFP could, in the future, become a widely adopted solution: a chemistry with higher energy density and the same advantages as LFP seems ideal.
But today we cannot yet say it is a compromise-free technology. In fact, we are not seeing a rush from suppliers to bring it to market, nor signs of an imminent revolution.
For this reason, at Flash Battery we continue to follow the same approach we apply to every innovation: observe, test, validate, and introduce a new technology only when it is truly ready for industry.
“LMFP represents an interesting evolution, but before introducing a new chemistry into the industrial market, it is essential to validate its safety and reliability.”
Alan Pastorelli, CTO and Co-Founder, Flash Battery
Bibliography
[1] https://www.researchgate.net/figure/Typical-voltage-profiles-of-NCA-LFP-LMFP-and-LiVOPO-4-cathodes-obtained-from_fig18_295909599
