Compared with the hot violet-rich lithium-rich manganese layered solid solution (OLO) materials at home and abroad in recent years, nickel-manganese spinel (LNMS) does not seem to attract much attention.

But what I want to say here is that LNMS is precisely the most mature one in 5V materials. towsonbattery Our research shows that after doping and modification of this material, even with conventional electrolytes, it has good cyclability and rate performance. Of course, the safety needs to be further improved.

The electrochemical performance decreased at a high temperature of 55 degrees, but it was still acceptable. Basically, it can be said that the modified LNMS is relatively mature in terms of the material itself. There are also two factors restricting the industrialization of HNMS. The first is still the problem of high-pressure electrolyte.

5V For conventional electrolytes, even with additives, the oxidative decomposition is still serious, and it will be more prominent at a high temperature of 55 degrees. Therefore, from the perspective of practical use, the electrolyte is still the primary problem that must be solved. The second factor is the market positioning of LNMS.

LNMS has a high voltage of 5V and a capacity of 130V. Many people take it for granted that it will be the main substitute material for LCO of 3C small batteries in the future. Is that so?

We can superimpose the discharge curves of LNMS and 4.2V, 4.35V and 4.5VLCO in a graph and then integrate them to compare the energy densities of LNMS and LCO.

Although HNMS has a high voltage of 4.7V, its energy density is only slightly higher than that of 4.35VLCO. Considering that LCO can achieve 4.1 compaction and LNMS can only reach 3.0, the volumetric energy density of LNMS is already higher than that of LNMS. 4.35VLCO is low.

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Not to mention compared with 4.5VLCO! Simple analysis, it is found that LNMS has no energy density advantage compared with high-end LCO and high-voltage NMC on 3C small batteries.

In terms of price, LNMS is a lot cheaper, but the high-end 3C battery itself is not so sensitive to price. So where is HNMS positioned? I personally think that the combination of LNMS/LTO may be applied to HEV.

The energy density of this system is higher than that of LMO/LTO, and it is likely to become the next-generation alternative to LMO/LTO power batteries. The development of electric vehicles is far below people’s expectations, so I personally think that the commercialization of LHMS may take a few years after HEV has developed to a certain extent.