Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of high-capacity and high-compaction-density graphite composite material
The invention discloses a preparation method of a high-capacity and high-compaction-density graphite composite material. The preparation method comprises the following steps: firstly, mixing a graphite precursor, a conductive agent, lithium borate and a coating material to obtain a mixture; carrying out thermal polymerization on the mixture, and introducing modified gas to carry out gas-phase doping; and finally, carrying out composite granulation and graphitization. According to the method, lithium borate has a bonding effect for secondary granulation and contains sufficient lithium ions, so that the irreversible capacity is reduced, the first efficiency of the material is improved, and meanwhile, the electron conductivity of the conductive agent is utilized, so that the activity of the negative electrode material is improved, and the specific capacity of the negative electrode material is improved; the prepared graphite composite material has the characteristics of high specific capacity, high compaction density, high first efficiency, excellent low-temperature performance and the like.
本发明公开了一种高容量高压实密度石墨复合材料的制备方法，首先通过将石墨前驱体、导电剂、硼酸锂与包覆材料混合得到混合物；之后将混合物进行热聚合，并通入改性气体进行气相掺杂；最后进行复合造粒和石墨化。该方法利用硼酸锂自身具有粘结作用进行二次造粒和含有充足的锂离子降低其不可逆容量提高其材料的首次效率，同时利用导电剂的电子导电性，提高负极材料活性提高其比容量的发挥，其制备出的石墨复合材料具有比容量高、压实密度高、首次效率高及其低温性能优异等特性。
Preparation method of high-capacity and high-compaction-density graphite composite material
The invention discloses a preparation method of a high-capacity and high-compaction-density graphite composite material. The preparation method comprises the following steps: firstly, mixing a graphite precursor, a conductive agent, lithium borate and a coating material to obtain a mixture; carrying out thermal polymerization on the mixture, and introducing modified gas to carry out gas-phase doping; and finally, carrying out composite granulation and graphitization. According to the method, lithium borate has a bonding effect for secondary granulation and contains sufficient lithium ions, so that the irreversible capacity is reduced, the first efficiency of the material is improved, and meanwhile, the electron conductivity of the conductive agent is utilized, so that the activity of the negative electrode material is improved, and the specific capacity of the negative electrode material is improved; the prepared graphite composite material has the characteristics of high specific capacity, high compaction density, high first efficiency, excellent low-temperature performance and the like.
本发明公开了一种高容量高压实密度石墨复合材料的制备方法，首先通过将石墨前驱体、导电剂、硼酸锂与包覆材料混合得到混合物；之后将混合物进行热聚合，并通入改性气体进行气相掺杂；最后进行复合造粒和石墨化。该方法利用硼酸锂自身具有粘结作用进行二次造粒和含有充足的锂离子降低其不可逆容量提高其材料的首次效率，同时利用导电剂的电子导电性，提高负极材料活性提高其比容量的发挥，其制备出的石墨复合材料具有比容量高、压实密度高、首次效率高及其低温性能优异等特性。
Preparation method of high-capacity and high-compaction-density graphite composite material
一种高容量高压实密度石墨复合材料的制备方法
ZHOU SA (Autor:in) / YAO XIAHUI (Autor:in) / HAN SONG (Autor:in)
22.03.2022
Patent
Elektronische Ressource
Chinesisch
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