Ni（OH）2 with a high specific surface area was synthesized by a facile fast precipitation method.Porous nano-NiO was obtained by calcining Ni（OH）2 at 300 ℃.The NiO sample possesses a fine porous distribution at ar...Ni（OH）2 with a high specific surface area was synthesized by a facile fast precipitation method.Porous nano-NiO was obtained by calcining Ni（OH）2 at 300 ℃.The NiO sample possesses a fine porous distribution at around 3-10 nm.The BET specific surface area and pore volume of this sample are 218.1 m2/g and 0.31 cm3/g,respectively.The electrochemical characteristics of the samples were studied by cyclic voltammetry and constant current charge/discharge.The specific capacitance of the NiO sample is about 255 F/g in the 2.0 mol/L KOH solution.The sample also has a fine electrochemical stability.展开更多
导电聚合物材料具有原料价格低廉、比重轻、具可塑性、微结构便于控制等优点,在锂离子电池方面具有应用的潜力.聚萘是一种良好的导电高分子,它具有许多优良的光电性能.该文以3,4,9,10-二苯四甲酸酐为原料,在一定条件下,经高温煅烧合成...导电聚合物材料具有原料价格低廉、比重轻、具可塑性、微结构便于控制等优点,在锂离子电池方面具有应用的潜力.聚萘是一种良好的导电高分子,它具有许多优良的光电性能.该文以3,4,9,10-二苯四甲酸酐为原料,在一定条件下,经高温煅烧合成一种石墨状聚萘,并以这种石墨状聚萘为锂离子电池正极材料,对其进行探索性研究.通过红外光谱、拉曼光谱、热失重、扫描电镜等分析手段,对合成的石墨状聚萘做了相应的结构和外貌表征;利用恒流充放电、循环伏安和交流阻抗等电化学方法来研究石墨状聚萘的电化学性能.结果表明,通过上述合成方法,成功合成了石墨状聚萘,经电化学性能测试发现石墨状聚萘有较大的放电容量、良好的循环稳定性,在电流密度为100 m Ah·g-1的条件下,首次放电容量高达281.3 m Ah·g-1,100次循环后,容量仍保持在188.4 m Ah·g-1,容量保持率高达66.97%.因此,石墨状聚萘是一种较为理想的锂离子电池的正极材料.展开更多
文摘Ni（OH）2 with a high specific surface area was synthesized by a facile fast precipitation method.Porous nano-NiO was obtained by calcining Ni（OH）2 at 300 ℃.The NiO sample possesses a fine porous distribution at around 3-10 nm.The BET specific surface area and pore volume of this sample are 218.1 m2/g and 0.31 cm3/g,respectively.The electrochemical characteristics of the samples were studied by cyclic voltammetry and constant current charge/discharge.The specific capacitance of the NiO sample is about 255 F/g in the 2.0 mol/L KOH solution.The sample also has a fine electrochemical stability.
文摘导电聚合物材料具有原料价格低廉、比重轻、具可塑性、微结构便于控制等优点,在锂离子电池方面具有应用的潜力.聚萘是一种良好的导电高分子,它具有许多优良的光电性能.该文以3,4,9,10-二苯四甲酸酐为原料,在一定条件下,经高温煅烧合成一种石墨状聚萘,并以这种石墨状聚萘为锂离子电池正极材料,对其进行探索性研究.通过红外光谱、拉曼光谱、热失重、扫描电镜等分析手段,对合成的石墨状聚萘做了相应的结构和外貌表征;利用恒流充放电、循环伏安和交流阻抗等电化学方法来研究石墨状聚萘的电化学性能.结果表明,通过上述合成方法,成功合成了石墨状聚萘,经电化学性能测试发现石墨状聚萘有较大的放电容量、良好的循环稳定性,在电流密度为100 m Ah·g-1的条件下,首次放电容量高达281.3 m Ah·g-1,100次循环后,容量仍保持在188.4 m Ah·g-1,容量保持率高达66.97%.因此,石墨状聚萘是一种较为理想的锂离子电池的正极材料.
