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首页> 外文会议>Pacific Rim Meeting on Electrochemical and Solid-State Science >Cotton-Candy-like Na_4VMn_(0.9)Cu_(0.1)(PO_4)_3/C Cathode Via Rapid Pyrosynthesis Technique for Long-Life Sodium-Ion Battery
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Cotton-Candy-like Na_4VMn_(0.9)Cu_(0.1)(PO_4)_3/C Cathode Via Rapid Pyrosynthesis Technique for Long-Life Sodium-Ion Battery

机译：棉花 - 糖果般的NA_4VMN_（0.9）CU_（0.1）（PO_4）_3 / C阴极通过快速吡咯合成技术进行长寿命钠离子电池

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Over the last decade, there is an inviting grace for sodium-ion batteries (SIBs) as a like-for-like equivalent for Lithium-ion batteries (LIBs), that supplies high voltage and superior energy, due to the low battery-manufacturing cost and extensive availability of sodium resources. NASICON-type Na_4MnV(PO_4)_3 (NMVP) cathode explored for SIBs proven to be encouraging because of the high operating voltage, high specific capacity, and three-dimensional framework. However, the inherent conductivity issue limits the rate-performance and complete utilization of the specific capacity of the cathode material. In this study we demonstrated the preparation of Cu-doped NVMP or (Na_4Mn_(0.9)Cu_(0.1)PO_4)_3) with cotton-candy-like architecture wrapped by a thin layer of uniform carbon NVMCP/C/CC by a rapid pyro-synthesis technique. In situ synchrotron XRD and GITT studies revealed the two-phase reaction mechanism upon electrochemical Na-ion extraction/insertion process, while DFT analysis entrenched the critical reasons behind the improved electronic conduction of the NVMCP/C/CC cathode. The superior electrochemical properties of the NVMCP/C/CC cathode at low (79 mAh g~(-1) after 450 cycles at 1.5 C) and high current rates (68 mAh g~(-1) after 3000 cycles at 30 C) demonstrate that the combination of a three-dimensional nanoarchitecture, uniform carbon-coating, and Cu-doping is favorable for improving the electrochemical properties of NVMP cathodes.
机译：在过去十年中，由于电池制造的低电压和卓越的能量，钠离子电池（SIBS）有一种类似于类似的锂离子电池（LIBS）的迷人等同物的迷人恩典。钠资源的成本和广泛可用性。由于高效电压，高特定容量和三维框架，探索用于SIB的SIBs探索的NASICON型NA_4MNV（PO_4）_3（NMVP）阴极。然而，固有的电导率问题限制了阴极材料的比容量的速率性能和完全利用。在这项研究中，我们证明了用棉花 - 糖类架构的Cu-掺杂的NVMP或（Na_4MN_（0.9）Cu_（0.1）Cu_（0.1）-4）_3）通过快速的热传式用薄的均匀碳NVMCP / C / CC包裹的棉花 - 糖果架构 - 合成技术。原位同步XRD和GITT研究显示了在电化学Na离子提取/插入过程中的两相反应机制，而D​​FT分析将批判性原因根深蒂固的NVMCP / C / CC阴极反射。在450℃下450次循环后的NVMCP / C / CC阴极的优异电化学性能，在1.5℃的450次循环后（68mAh g〜（-1），30℃的高电流速率）证明三维纳米建筑学，均匀的碳涂层和Cu掺杂的组合有利于改善NVMP阴极的电化学性质。

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