lithium vanadyl orthophosphate | 83348-01-0

• 英文名称: lithium vanadyl orthophosphate
• 英文别名: lithium vanadium phosphate
• CAS: 83348-01-0
• 化学式: Li*OV*O₄P
• 分子量: 168.853
• InChiKey: CUDHOZUQGQWQMM-UHFFFAOYSA-K

计算性质

• 辛醇/水分配系数(LogP)：
  -5.94
• 重原子数：
  8.0
• 可旋转键数：
  0.0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  103.32
• 氢给体数：
  0.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  lithium vanadyl orthophosphate 以 further solvent(s) 为溶剂， 生成
  参考文献：
  名称：

  锂在层状结构Li 4 VO（PO 4）2中的定向插入：隧道结构Li 5 VO（PO 4）2

  摘要：

  一个新的V（III）的磷酸锂Li 5 VO（PO 4）2已通过锂的电化学插入锂合成4 VO（PO 4）2。在空间群I 4 / mcm中结晶的该相显示出与Li 4 VO（PO 4）2的层状结构和VO（H 2 PO 4）2的隧道结构密切相关的隧道结构。从VO（H 2 PO 4）2开始，在锂交换和嵌入过程中发生的全位反应在V 4+和V 3+物种的柔性配位的基础上，解释了Li 5 VO（PO 4）2进入最后阶段的过程。还在结构尺寸的基础上介绍和解释了该新相的电化学和磁性。

  DOI：

  10.1016/j.jssc.2008.01.044
• 作为产物：
  描述：

  以 neat (no solvent, solid phase) 为溶剂， 生成 lithium vanadyl orthophosphate
  参考文献：
  名称：

  Facile Synthesis of Zero-, One-, and Two-Dimensional Vanadyl Pyrophosphates

  摘要：

  Crystallization of Na2VOP2O7 from its aqueous solution results in formation, of a one-dimensional inorganic polymer {Na2VO-(H2O)P2O7 center dot 7H(2)O) (1). When this polymer is dehydrated at elevated temperatures this polymer undergoes a phase transition to form the two-dimensional framework beta-Na2VOP2O7, which although previously reported had been difficult to access. Exchanging lithium for sodium via ion-exchange chromatography results in formation of a discrete, cyclic, tetramer species, Li-g[VOP2O7(H2O)center dot 4H(2)O](4) (2). Isolation of crystalline beta-K2VOP2O7 using a dehydration procedure analogous to the one employed for the sodium derivative was unsuccessful. In contrast, we show that beta-K2VOP2O7 can be obtained from the amorphous phase K2VOP2O7 center dot nH(2)O (n = 0-7) upon thermal dehydration.

  DOI：

  10.1021/ic200510y

文献信息

• Effects of Ti Doping on the Structural Stability and Enhanced Electrochemical Performance of α-LiVOPO₄
  作者：Seong-Hun Lee、Kwang-Sun Ryu

  DOI：10.1002/bkcs.11586

  日期：2018.11

  confirmed by X‐ray diffraction, Fourier‐transform infrared spectroscopy, and X‐ray photoelectron spectroscopy. Inductively coupled plasma–optical emission spectroscopy was conducted to determine the precise state. The shape and size of the particles were observed by field‐emission scanning electron microscopy. In situ X‐ray absorption spectroscopy was performed to confirm the structural behavior during the

  磷酸氧钒锂具有七个不同的结晶相。其中，α-的LiVOPO 4是由于其相对高的能量密度和比其它磷酸盐3.9V的氧化还原电压的选择。在这项研究中，钛4+掺杂的α-LIV 1- X的Ti X OPO 4（X = 0.00，0.003，0.005，0.007和0.01）使用溶胶-凝胶法，以增加结构的稳定性和电化学性能制备。具有空间群P的三斜结构‐1通过X射线衍射，傅立叶变换红外光谱和X射线光电子能谱确定。进行了电感耦合等离子体-光发射光谱法以确定精确状态。通过场发射扫描电子显微镜观察颗粒的形状和大小。进行原位X射线吸收光谱法以确认电化学反应过程中的结构行为。进行了电化学测量，例如循环伏安法和恒电流充放电。α-LIV 1- X的Ti X OPO 4（X ＝ 0.003、0.005、0.007和0.01）显示了循环期间的结构稳定性以及随着锂离子扩散系数的增加而在充电和放电期间的极化降低。α-LIV 0
• Chemically lithiated layered VOPO4 by a microwave-assisted hydrothermal method and its electrochemical properties in rechargeable Li-ion batteries and supercapacitor applications
  作者：Mawuse Amedzo-Adore、Jeong In Han

  DOI：10.1016/j.jallcom.2022.165067

  日期：2022.8

  state (+5 to +4), which resulted in a decrease of the band gap. Electrochemical properties of LVOP were evaluated as both a cathode and an anode in a half-cell lithium-ion battery system. The electrode used as a cathode, demonstrated a high capacity of 265 mAhg−1 at 0.1 C as well as 77 mAhg−1 at a high rate of 2 C. When used as an anode, the material exhibits an initial capacity of 865 mAhg−1 at 0.1 C

  磷酸氧钒锂（LiVOPO 4 ）是磷酸氧钒（VOPO 4 ）的衍生物，具有不同的多晶型物，可以根据所采用的合成方法获得。LiVOPO 4最近因其作为锂离子电池电极的钒氧化还原活性变化而引起的多电子电化学特性而受到关注。在这项工作中，我们通过微波辅助水热法将Li嵌入溶剂热合成的多晶四方层状VOPO 4 .2H 2 O (VOP)中获得了单晶四方层状LiVOPO 4 (LVOP)。我们发现 Li +进入分层 VOP 导致层间距从 0.726 nm 减小到 0.449 nm 以及钒氧化态（+5 到 +4）的降低，这导致带隙减小。LVOP 的电化学性能在半电池锂离子电池系统中作为阴极和阳极进行了评估。用作阴极的电极在 0.1 C 下表现出 265 mAhg -1的高容量，在 2 C 的高倍率下表现出 77 mAhg -1的高容量。当用作阳极时，该材料表现出 865 mAhg -的初始容量1在 0.1
• Comparative investigation of microporous and nanosheet LiVOPO₄ as cathode materials for lithium-ion batteries
  作者：Jun-chao Zheng、Ya-dong Han、Bao Zhang、Chao Shen、Lei Ming、Jia-feng Zhang

  DOI：10.1039/c4ra06797e

  日期：——

  Nanosheets LiVOPO₄ synthesized by freeze drying exhibit much better electrochemical performance than microporous LiVOPO₄ synthesized by spray drying.

  与喷雾干燥法合成的微孔型 LiVOPO4 相比，冷冻干燥法合成的纳米片状 LiVOPO4 具有更好的电化学性能。
• Electrochemical Properties of Beta-LiVOPO[sub 4] Prepared by Carbothermal Reduction
  作者：J. Barker、M. Y. Saidi、J. L. Swoyer

  DOI：10.1149/1.1723494

  日期：——

  β-LiVOPO 4 [Pnma, a = 7.446(4) A, b = 6.278(4) A, and c = 7.165(4) A] has been synthesized by a two-stage method involving a novel carbothermal reduction (CTR) reaction. The vanadium (V) precursor compound, α-VOPO 4 xH 2 O was initially precipitated as thin platelets from an aqueous solution containing V 2 O 5 and phosphoric acid. In the subsequent carbothermal reduction step, the anhydrous α-VOPO 4 was

  电活性磷酸氧钒锂相，β-LiVOPO 4 [Pnma, a = 7.446(4) A, b = 6.278(4) A, and c = 7.165(4) A] 已通过两步法合成新型碳热还原 (CTR) 反应。钒 (V) 前体化合物 α-VOPO 4 xH 2 O 最初从含有 V 2 O 5 和磷酸的水溶液中沉淀为薄片。在随后的碳热还原步骤中，无水 α-VOPO 4 与碳酸锂和高表面积碳反应生成单相 β-LiVOPO 4 产物。β-LiVOPO 4 材料使用 X 射线衍射、恒流循环和电化学电压光谱的组合进行表征。初步电化学评估确定可逆比容量高达 135 mAh/g，相当于 x = 0 的循环。85 在 Li 1-x VOPO 4 。差异容量数据的对称性质证实了插入反应的能量可逆性，尽管也可以检测到与不可逆电池反应存在一致的特征。在 C/20 和 C/40 下的恒流循环表明锂嵌入反应的长期稳定性由前
• Phase transition induced by lithium insertion in αI- and αII-VOPO4
  作者：N Dupré、G Wallez、J Gaubicher、M Quarton

  DOI：10.1016/j.jssc.2004.04.006

  日期：2004.8

  Lithium insertion in αI-VOPO4 and αII-VOPO4, either by chemical or electrochemical route, leads to the same new compound: αI-LiVOPO4 (space group P4/nmm). The structure, resolved by neutron and synchrotron diffraction, is made up of planes of corner-connected PO4 and VO5 polyhedra, whereas lithium atoms are located between the layers. The reversal of the short vanadyl bond that corresponds to the insertion-induced

  锂插入在α我-VOPO 4和α II -VOPO 4，或者通过化学或电化学途径，导致相同的新化合物：α我-LiVOPO 4（空间群P 4 / NMM）。通过中子和同步加速器衍射解析的结构由角连接的PO 4和VO 5多面体的平面组成，而锂原子位于两层之间。短键氧钒的反转对应于插入诱导α II - α我过渡在晶格能量方面找到了一种解释。它有利于锂离子在（0 0 1）层间平面中迁移，这是锂离子电池中作为电极材料的电化学性能的关键参数。