Titanium disulphide: A solid solution electrode for sodium and lithium
Titanium disulphide: A solid solution electrode for sodium and lithium
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DOI：
10.1016/0025-5408(76)90239-7
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发表时间：
1976-05
影响因子：
5.4
通讯作者：
D. Winn;J. Shemilt;B. Steele
中科院分区：
文献类型：
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作者：
D. Winn;J. Shemilt;B. Steele
TixS 2（x = 0.002，0.01，0.02）的单晶已被纳入到一个电化学池与碳酸丙烯酯作为非质子溶剂。使用库仑滴定法将钠或锂电插层到与这些晶体相关的货车德瓦尔斯层中以产生MyTixS 2型固溶体电极，并在环境温度下测量开路电压作为碱金属含量（0 < y < 1.0）的函数。在钠的电动势-成分曲线中观察到不连续性，但在锂的嵌入中记录到电压跨度仅为0.5V（2.4 − 1.9V）的平滑曲线。电化学脉冲实验还能够导出MyTixS 2中钠和锂的化学扩散系数值。这些数值范围在10 - 6到10 - 10 cm 2/s之间，受到货车范德华层中额外钛的强烈影响，这与原始TixS 2晶体中化学计量的偏差增加有关。
Single crystals of TixS2(x = 0.002, 0.01, 0.02) have been incorporated into an electrochemical cell with propylene carbonate as an aprotic solvent. Sodium or lithium was electro-intercalated into the Van der Waals layers associated with these crystals using coulometric titrations to produce a solid solution electrode of the type MyTixS2, and open circuit voltages were measured as a function of the alkali metal content (0 < y < 1.0) at ambient temperatures. Discontinuities were observed in the emf-composition curves for sodium, but a smooth curve with a voltage span of only 0.5V (2.4 − 1.9V) was recorded for the intercalation of lithium. Electrochemical pulse experiments also enabled values to be derived for the chemical diffusion coefficients of sodium and lithium in MyTixS2. These values, which ranged from 10−6to 10−10cm2/s, were strongly influenced by the presence of extra titanium in the Van der Waals layer associated with increasing deviation from stoichiometry in the original TixS2crystals.