calcium cobalt oxide | 12323-37-4

• 分子结构分类: 无机化合物 - 混合金属/非金属化合物 - 过渡金属有机体
• 英文名称: calcium cobalt oxide
• CAS: 12323-37-4
• 化学式: CaCo₂O₄
• 分子量: 222.062
• InChiKey: UUNPQTWNNPVIGS-UHFFFAOYSA-N

反应信息

• 作为产物：
  描述：

  以 neat (no solvent) 为溶剂， 生成 calcium cobalt oxide
  参考文献：
  名称：

  Vidyasagar; Gopalakrishnan; Rao, Inorganic Chemistry, 1984, vol. 23, # 9, p. 1206 - 1210

  摘要：

  DOI：

文献信息

• Structure and properties of the CaFe2O4-type cobalt oxide CaCo2O4
  作者：Mitsuyuki Shizuya、Masaaki Isobe、Eiji Takayama-Muromachi

  DOI：10.1016/j.jssc.2007.07.008

  日期：2007.9

  S=+147 μV/K at 380 K), and Schottky-type specific heat with a small Sommerfeld constant (γ=4.48(7) mJ/Co mol K2), were observed. These results suggest that the compound possesses a metallic electronic state with a small density of states at the Fermi level. The doped holes are localized at low temperatures due to disorder in the crystal. The carriers probably originate from slight off-stoichiometry of the

  首次合成了钴酸钙CaCo 2 O 4，并通过粉末X射线衍射研究，测量磁化率，比热，电阻率和热电功率对其进行了表征。的CaCo 2个Ó 4结晶在网吧2 ø 4（铁酸钙）型结构，包括一个边沿和角落共享的CoO 6八面体网络。CaCo 2 O 4的结构属于正交晶系（空间群：Pnma），其晶格参数为a = 8.789（2）Å，b = 2.9006（7）Å和c= 10.282（3）Å。居里-外斯状与近三价钴低自旋态（Co的磁化率行为3+，3 d   t2g6 ，小号= 0），半导体状电阻率的温度依赖性（ρ = 3×10 -1  Ω厘米380 K）在低温下具有主要的跳跃传导，取决于金属温度的大热电功率（Seebeck系数：在380 K时S = + 147μV/ K），并且肖特基型比热具有小的Sommerfeld常数（γ = 4.48） （7）mJ /钴摩尔K 2），进行观察。这些结果表明该化合物具有在
• Electrospun Hierarchical CaCo₂O₄Nanofibers with Excellent Lithium Storage Properties
  作者：Linlin Li、Shengjie Peng、Yanling Cheah、Yahwen Ko、Peifen Teh、Grace Wee、Chuiling Wong、Madhavi Srinivasan

  DOI：10.1002/chem.201302849

  日期：2013.10.25

  Moreover, as a demonstration of the functional properties of such hierarchical architecture, the 1D hierarchical CCO‐NFs were investigated as materials for lithium‐ion batteries (LIBs) anode; they not only delivers a high reversible capacity of 650 mAh g−1 at a current of 100 mA g−1 and with 99.6 % capacity retention over 60 cycles, but they also show excellent rate capability with respect to counterpart

  通过简便的静电纺丝方法并随后在空气中煅烧，制备了具有独特层次结构的分层CaCo 2 O 4纳米纤维（称为CCO-NFs）。所制备的CCO-NF由定义明确的超薄纳米板组成，它们以定向的方式排列以形成一维（1D）分层结构。还讨论了可控的形成过程和可能的形成机理。此外，为证明这种分层体系结构的功能特性，对一维分层CCO-NF作为锂离子电池（LIB）阳极材料进行了研究。它们不仅在100 mA g -1的电流下提供650 mAh g -1的高可逆容量并在60个循环中具有99.6％的容量保持率，但相对于纳米纤维中的相应纳米板和纳米板，它们也显示出出色的速率能力。高的比表面积以及分层结构的独特特征可能是增强电化学性能的原因。考虑到它们的制备简便和良好的锂存储性能，一维分层CCO-NFs将在实际的LIB中大有希望。
• Oxygen excess in the “114” cobaltite hexagonal structure: The ferrimagnet CaBaCo4O7.50
  作者：V. Pralong、V. Caignaert、T. Sarkar、O.I. Lebedev、V. Duffort、B. Raveau

  DOI：10.1016/j.jssc.2011.07.039

  日期：2011.9

  The study of the oxidation of the "114" orthorhombic cobaltite CaBaCo4O7, using first electrochemistry and then soft chemistry based on oxidation by NaClO, has allowed a new phase, CaBaCo4O7.50. to be prepared topotactically. The structural study of this phase shows that its hexagonal structure, closely related to that of orthorhombic CaBaCo4O7, is curiously similar to that of the members of the LnBaCo(4)O(7) series, in spite of its excess oxygen. Its magnetic study shows that this phase, like CaBaCo4O7, is ferrimagnetic with the same T-C (60 K), but differently exhibits an unusual magnetic hysteresis. This exceptional behavior of CaBaCo4O7 with respect to oxidation as well as the magnetic properties of CaBaCo4O7.50 is interpreted in terms of the presence of defects due to oxidation. (C) 2011 Elsevier Inc. All rights reserved.
• Structure and properties of the one-dimensional cobalt oxide CaCo2O4
  作者：M. Isobe、M. Arai、T. Kawashima、E. Takayama-Muromachi

  DOI：10.1016/j.physc.2009.05.107

  日期：2009.10

  We have studied crystal structure and transport properties of the quasi one-dimensional cobalt oxide CaCo2O4. The CaCo2O4 phase crystallizes in calcium-ferrite type structure, which consists of a corner-and edge-shared CoO6 octahedron network including one-dimensional double chains. Large thermoelectric power (S similar to 150 mu V/K at 390 K) with metallic temperature dependence of S, moderate resistivity (rho similar to 2.9 x 10(-1) Omega cm at 390 K) with carrier localization at low temperature, and normal thermal conductivity (kappa similar to 6.3 W/Km at 390 K) were observed. The phonon mean-free path was calculated from the observed data, as a function of temperature. The long phonon mean-free path (I similar to 24 angstrom at 300 K) implies that the thermal conductivity could be suppressed by impurity scattering of phonons with partial element Substitution. (C) 2009 Elsevier B.V. All rights reserved.