Abstract
Layered lithium nickel manganese cobalt oxide or NMC type cathode materials dominate the lithium-ion battery market. However, the production of their precursor involves the use of large amounts of water and can create waste. All-dry synthesis methods are attractive as they are potentially cheaper and greener. However, it remains a challenge to achieve atomic scale mixing of the precursor elements by dry methods. Here, we report an alternative route to achieve atomic scale mixing by employing thermal interdiffusion to produce a phase pure rock salt structure precursor for NMC cathode materials, which can significantly shorten the preparation time and may further reduce cost. The complications and applicability of using a thermally synthesized precursor to make layered cathode material are presented in detail.
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