| 51373-88-7

• 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
• CAS: 51373-88-7
• 化学式: Ca₂Co₂O₅
• 分子量: 278.139
• InChiKey: KKZIYXWCDWIVTL-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  -5.96
• 重原子数：
  9.0
• 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：
  157.5
• 氢给体数：
  0.0
• 氢受体数：
  0.0

反应信息

• 作为产物：
  描述：

  以 neat (no solvent) 为溶剂， 生成
  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

• Enhanced Catalytic Activity and Stability of the Oxygen Evolution Reaction on Tetravalent Mixed Metal Oxide
  作者：Ikuya Yamada、Masaya Kinoshita、Seiji Oda、Hirofumi Tsukasaki、Shogo Kawaguchi、Kengo Oka、Shigeo Mori、Hidekazu Ikeno、Shunsuke Yagi

  DOI：10.1021/acs.chemmater.0c00061

  日期：2020.5.12

  brownmillerite oxides with trivalent and tetravalent Fe and Co ions. Regardless of crystal structures and valence states, the Fe–Co mixing enhances the OER activities compared to the parent compounds. In particular, CaFe0.5Co0.5O3, a perovskite oxide consisting of Fe4+ and Co4+ ions, displays a significant increase in OER activity, which is comparable to BSCF, together with the enhancement of stability. The

  氧气释放反应（OER）是实现可持续社会的关键能量转化反应。据报道，Fe-Co混合氧化物中具有高活性的OER催化剂，例如钙钛矿型Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O3 -δ（BSCF）和褐铁矿型Ca 2 FeCoO 5。在这些氧化物中，Fe-Co混合对OER活性具有协同作用。然而，由于其结构随机性，尚未讨论细节。在这项研究中，我们研究了Fe-Co混合对几种含三价和四价Fe和Co离子的钙钛矿和褐煤氧化物的OER催化活性的影响。不论晶体结构和价态如何，与母体化合物相比，Fe-Co混合均可提高OER活性。尤其是，由Fe 4+和Co 4+离子组成的钙钛矿型氧化物CaFe 0.5 Co 0.5 O 3的OER活性显着提高，与BSCF相当，并且稳定性增强。CaFe的电子态通过特殊的准随机结构模型通过密度泛函理论计算获得的0.5 Co 0.5 O 3表现出具有比母体化合物CaFeO 3和CaCoO
• Thermoelectric solid-oxide fuel cell with Ca2Co2O5 as cathode material
  作者：Tao Wei、Yun-Hui Huang、Long Jiang、Jun-You Yang、Rui Zeng、John B. Goodenough

  DOI：10.1039/c2ra22381c

  日期：——

  In a solid-oxide fuel cell (SOFC), a thermoelectric material used as the cathode can generate extra electric power from the temperature gradient caused by the cell ohmic energy loss. Such a thermoelectric SOFC is an effective strategy to enhance the efficiency of fuel utilization by consuming waste heat. In this work, Ca2Co2O5 (CCO) has been employed as the cathode material for the thermoelectric SOFC. A conventionally designed SOFC with CCO as cathode exhibits a power density of 522 mW cm−2 at 800 °C in H2 fuel. By fabricating a novel thermoelectric SOFC with a dense CCO elongated cathode, the detected open circuit voltage of the cell increases from 1.1289 V to 1.1384 V, indicative of the existence of an additional thermoelectric voltage of 9.4 mV.

  在固态氧化物燃料电池（SOFC）中，用作阴极的热电材料可以利用电池欧姆能量损失引起的温度梯度产生额外的电能。这种热电 SOFC 是一种通过消耗余热来提高燃料利用效率的有效策略。在这项研究中，Ca2Co2O5（CCO）被用作热电 SOFC 的阴极材料。传统设计的 SOFC 采用 CCO 作为阴极，在 800 °C 的 H2 燃料条件下功率密度为 522 mW cm-2。通过制造具有致密 CCO 加长阴极的新型热电 SOFC，电池的检测开路电压从 1.1289 V 增加到 1.1384 V，表明存在 9.4 mV 的额外热电电压。
• High-temperature electrical transport behaviors of the layered Ca2Co2O5-based ceramics
  作者：Jinle Lan、Yuan-Hua Lin、Guo-jing Li、Shaoliang Xu、Yong Liu、Ce-Wen Nan、Shu-Jin Zhao

  DOI：10.1063/1.3425891

  日期：2010.5.10

  Textured Bi-substituted Ca2Co2O5 ceramics have been prepared using a coprecipitation method combined with spark plasma sintering. The Bi substitution is effective in increasing the grain orientation of the Ca2Co2O5-based ceramics (from 0.46 to 0.85). Electrical conductivity increases obviously with partial substitution of Bi3+ for Ca2+ (from 113.9 to 142.4 S/cm at 973 K). The Ca1.92Bi0.08Co2O5 sample

  使用共沉淀法与放电等离子烧结相结合的方法制备了有纹理的双取代 Ca2Co2O5 陶瓷。Bi 取代可有效提高 基陶瓷的晶粒取向（从 0.46 到 0.85）。随着 Bi3+ 部分取代 Ca2+，电导率明显增加（973 K 时从 113.9 到 142.4 S/cm）。Ca1.92Bi0.08Co2O5 样品在 973 K 时表现出比纯 （3.2×10-4 W m-1 K-2）更高的功率因数（4.4×10-4 W m-1 K-2），表明 系统是另一种用于高温热电应用的有前途的 p 型材料。
• Rapid synthesis of Ca2Co2O5 textured ceramics by coprecipitation method and spark plasma sintering
  作者：Yanfeng Zhang、Jiuxing Zhang、Qingmei Lu

  DOI：10.1016/j.jallcom.2005.02.053

  日期：2005.8

  Ca2Co2O5 textured ceramics were rapidly prepared by a coprecipitation method and spark plasma sintering (SPS) using cobalt and calcium nitrates as starting materials and sodium hydroxide as precipitant. Single phase Ca2Co2O5 ceramics can be obtained by SPS at 800 degrees C for 5 min using the precursor powders calcined at 700-850 degrees C for 2 h. It is critical to obtain stochiometric precursor by controlling the final pH 13.2 during the coprecipitation process. The SPS process is effective in obtaining single phase Ca2Co2O5 ceramics. The thermoelectric properties of the prepared sample were investigated from 100 to 700 degrees C. At 700 degrees C, the electrical resistivity, Seebeck coefficient, thermal conductivity and figure of merit of the sample are 9.30 x 10(-5) Omega m, 178 mu V/K, 1.55 W/mK and 0.21, respectively. (c) 2005 Elsevier B.V. All rights reserved.
• Mixed oxides Ca2Fe2O5 and Ca2Co2O5 as anode materials for Li-ion batteries
  作者：N Sharma、K.M Shaju、G.V Subba Rao、B.V.R Chowdari

  DOI：10.1016/j.electacta.2003.10.014

  日期：2004.3

  The electrochemical performance of mixed oxides, Ca2Fe2O5 and Ca2CO2O5 for use in Li-ion batteries was studied with Li as the counter electrode. The compounds were prepared and characterized by X-ray diffraction and SEM. Ca2Fe2O5 showed a reversible capacity of 226 mAh/g at the 14th cycle and retained 183 mAh/g at the end of 50 cycles at 60 mA/g in the voltage window 0.005-2.5 V. A reversible capacity in the range, 365-380 mAh/g, which is stable up to 50 charge-discharge cycles is exhibited by Ca2CO2O5 in the voltage window, 0.005-3.0 V and at 60 mA/g. This corresponds to recycleable moles of Li of 3.9 +/- 0.1 (theoretical: 4.0). Significant improvement in the cycling performance and attainable reversible capacity were noted for Ca2CO2O5 on cycling to an upper cut-off voltage of 3.0 V as compared to 2.5 V. Coulombic efficiency for both compounds is >98%. Electrochemical impedance spectroscopy (EIS) data clearly indicate the reversible formation/decomposition of polymeric surface film on the electrode surface of Ca2CO2O5 in the voltage window, 0.005-3.0 V. Cyclic voltammetry results compliment the galvanostatic cycling data. (C) 2003 Published by Elsevier Ltd.