CAJ | 학술논문

利用石墨层间化合物技术处理天然石墨，使磷酸进入到石墨层表面，并在石墨表面包覆一层有机胺中间体，然后在惰性气氛下进行高温处理。研究发现，所得材料在保持石墨原始结构不被破坏的情况下，增大了石墨的层间距，为锂离子的嵌入和脱出拓宽了通道，也为材料在充放电过程中预留了膨胀体积。将这种材料用于锂离子电池负极材料、电化学性能测试表明或改性材料中可具有更小的不可逆容量和更高的充放电效率，并且在大电流充放电情况下，倍率性能得到了提升。
이용석묵층간화합물기술처리천연석묵，사린산진입도석묵층표면，병재석묵표면포복일층유궤알중간체，연후재타성기분하진행고온처리。연구발현，소득재료재보지석묵원시결구불피파배적정황하，증대료석묵적층간거，위리리자적감입화탈출탁관료통도，야위재료재충방전과정중예류료팽창체적。장저충재료용우리리자전지부겁재료、전화학성능측시표명혹개성재료중가구유경소적불가역용량화경고적충방전효솔，병차재대전류충방전정황하，배솔성능득도료제승。
The natural graphite was processed with technology of graphite intercalation componds(GICs), made sure that phosphoric acid has got into the surface of graphite layer, and coated with a layer of organic amine intermediates on the surface of graphite. Then the graphite was processed by high-temperature treatment under the inert atmosphere. The results showed that the interlayer space of the samples was increased and primary structure of the samples was retained which broadened the channels of Li+transference and also reserved the room for expanding of the samples. Using this sample as anode material of lithium-ion batteries, H3PO4 modified sample has got smaller irreversible capacity and higher coulombic effciency as well as the rate capacility.