A new flux synthesis is elaborately designed to synthesize LiNi_0.5Co_0.2Mn_0.3O₂ whose precursor is prepared by room-temperature solid-state reactions with the simultaneous formation of a composite flux medium NaNO₃-NaCl. The NaNO₃ in the precursor can release oxygen via thermal decomposition and thus an inner oxygen-rich environment within molten salt can be in situ created and ensures sufficient oxidation of partial Ni²⁺ to Ni³⁺ during flux synthesis of LiNi_0.5Co_0.2Mn_0.3O₂. Our comparative experiments demonstrate that this in situ self-oxygenation can then reduce the Li⁺/Ni²⁺ mixing in the obtained LiNi_0.5Co_0.2Mn_0.3O₂ and ultimately improved electrochemical performance is achieved as compared with that obtained by the traditional flux synthesis.

中文翻译：

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原位自充氧助熔剂合成LiNi 0.5 Co 0.2 Mn 0.3 O 2

精心设计了一种新的助熔剂合成方法，以合成LiNi _0.5 Co _0.2 Mn _0.3 O _2，其前体是通过室温固相反应制备的，同时形成了复合助熔剂介质NaNO ₃ -NaCl。前驱体中的NaNO ₃可以通过热分解释放氧气，因此可以在熔盐内部原位创建富氧内部环境，并确保在LiNi _0.5 Co _0.2 Mn的助熔剂合成过程中将部分Ni ²⁺充分氧化为Ni ³⁺。_0.3 Ò ₂。我们的比较实验表明，这种原位自氧化可以减少在LiNi _0.5 Co _0.2 Mn _0.3 O _2中获得的Li ⁺ / Ni ²⁺混合，与传统的助熔剂合成相比，最终电化学性能得到改善。 。