First, the high manganese lithium-rich ternary materials and general patent, there are some conflicts, in short there is no specific boundaries, and non-cobalt-rich lithium two yuan materials can also be seen as a lithium-rich high-manganese species, since the patents are not so fine points, we do not have to dwell on his true definition of a word, to the industrialization of the material is good material.
Speaking of industry issues, as high manganese lithium-rich nickel content is generally less than 10% (according to the American point of view, not doped cobalt, the effect is better, but from our current experiments, it seems not feasible) , on this point advantage in the long term can be mad at ordinary high cobalt content of ternary, because the cobalt as a scarce resource, sooner or later have to withdraw from the size of the cathode material for lithium stage, of course, this is the post-post about later.
High current lithium-rich manganese capacity more than 250 grams of material, but compaction density is difficult to over 2.4, and the current high energy density compared to the ternary material, although the ratio of energy per unit mass obvious advantages, but the ratio of energy per unit volume than Our ternary LNCM-35, and almost no advantage, which is why we delay in product launch one of the reasons.
However, some focus on the energy per unit mass than the customers, the high manganese lithium-rich can not be replaced, so the effective increase in the density of compacted before the lithium-rich high-manganese batteries can only be the darling of the military, industrial short-term difficulties heavy for the following reasons:
1 manganese lithium-rich high-rate performance is not good. To see a yesterday, its capacity to play at 0.5C for up to 270 grams or more, but 1C, the decay would have a great, although another relative, the rate performance is acceptable, but gram capacity only 250 or so, so how to balance good gram capacity is a major issue currently facing, usually to our understanding point of view, cobalt in the triple layered structure for stability and to improve the rate performance irreplaceable role, so low cobalt content of the high manganese lithium-rich material, perhaps increase rate performance was indeed a major issue.
(2) morphology control problems. The high manganese lithium-rich material than the D50 at 10 microns, specific surface area of up to 3.9 and 5.3, if such a high surface area materials into account the stability of its life cycle should not be high. Of course, as the sample does not represent the future direction of development, but from the lithium manganese oxide has a high specific surface area due to side effects and high specific surface area of lithium iron phosphate remained stable under the perspective of considering, in a word, mixed. The key question is how to improve compaction by controlling the morphology of the density.
3 Tap and compaction density is low. As we all know, the activity of the ternary material is just better than in many materials of lithium iron phosphate, which is the rate capability and low temperature performance of lithium manganese oxide slightly less than the reason, the current lithium-rich manganese is high, the tap density is about 1.5, taking into account the topography, in the actual compaction can not be too high, in the general advantages of the application of power products generally. However, given the current morphology control issues, you want to reach the current level of ternary, long way to go.
4 cost. At present, many people know but they can not explain the high lithium-rich manganese is consistency, consistency of the product will undoubtedly increase the cost of lithium-rich manganese and high industrialization process, the current real-life example is lithium iron phosphate, of course, with ratio, the high manganese lithium-rich problem seems to be more elusive.
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