Fabrication of Na2FeP2O7 glass-ceramics for sodium ion battery
Fabrication of Na2FeP2O7 glass-ceramics for sodium ion battery
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DOI：
10.2109/jcersj2.120.344
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发表时间：
2012-08-01
影响因子：
1.1
通讯作者：
Komatsu, Takayuki
中科院分区：
文献类型：
--
作者：
Honma, Tsuyoshi;Togashi, Takuya;Komatsu, Takayuki
采用微晶玻璃法成功制备了钠离子二次电池正极候选材料Na 2FeP 2 O 7。采用熔融淬冷法制备了与Na 2FeP 2 O 7组成相同的前驱体玻璃。通过在电炉中在620 ℃下将添加有10%葡萄糖作为Fe 3+的还原剂的前体玻璃粉末热处理3 h来获得Na 2FeP 2 O 7。Na_2FeP_2O_7具有三斜晶系的P1结构，a = 0.64061 nm，B = 0.938893 nm，c = 1.09716 nm，α = 64.5381度，β = 86.0580度，γ = 73.0619度。在2.0- 3.8V的截止电压范围内，Na_2FeP_2O_7的电化学充放电容量为2.9V，88 mAh/g，达到理论容量的90%。Na_2FeP_2O_7陶瓷材料具有低成本的优点，有望成为钠离子电池的安全阴极候选材料。（C）2012年日本陶瓷学会。All rights reserved.
New cathode candidate Na2FeP2O7 for rechargeable sodium ion second battery was successfully prepared by glass-ceramics method. The precursor glass, which is same composition in Na2FeP2O7, was prepared by melt-quenching method. Na2FeP2O7 was obtained by heat treatment of precursor glass powder with 10% glucose addition as reduction agent of Fe3+ at 620 degrees C for 3 h in electric furnace. Na2FeP2O7 has triclinic P1-structure with a = 0.64061 nm, b = 0.938893 nm, c = 1.09716 nm, alpha = 64.5381 degrees, beta = 86.0580 degrees, gamma = 73.0619 degrees. By means of electrochemical charge discharge testing, Na2FeP2O7 exhibits 2.9 V, 88 mAh/g, in which is 90% for the theoretical capacity during 2.0-3.8 V cut-off voltages. Na2FeP2O7 ceramics has the potential for the safety cathode candidate for the sodium ion battery with a low materials cost. (C)2012 The Ceramic Society of Japan. All rights reserved.