CAJ | 학술논문

羧甲基壳聚糖（C-CTS）作为磷酸铁锂（LiFePO4, LFP）正极水系粘结剂的两种改性方式分别是：（1）与聚环氧乙烷（PEG）共混制备C-CTS/PEG复合粘结剂；（2）在C-CTS/PEG混合体系中，以三羟甲基丙烷-三[3-(2-甲基吖丙啶基)丙酸酯]（XR-104）作为交联剂制备可交联的 C-CTS/PEG/XR-104水系粘结剂。本文考察了不同C-CTS/PEG质量比复合粘结剂对LFP正极的电化学性能的影响，C-CTS/PEG的优化重量比为3∶1，此时LFP正极表现出最佳的循环稳定性。电池在0.5 C下充放电测试，140次循环后容量保持率为99%。采用差示扫描量热法（DSC）、傅里叶红外光谱仪（FTIR）和溶解实验等研究C-CTS/PEG与XR-104的交联反应，当交联剂XR-104的重量为C-CTS的1%时，LFP正极表现出最佳的电化学性能。
최갑기각취당（C-CTS）작위린산철리（LiFePO4, LFP）정겁수계점결제적량충개성방식분별시：（1）여취배양을완（PEG）공혼제비C-CTS/PEG복합점결제；（2）재C-CTS/PEG혼합체계중，이삼간갑기병완-삼[3-(2-갑기아병정기)병산지]（XR-104）작위교련제제비가교련적 C-CTS/PEG/XR-104수계점결제。본문고찰료불동C-CTS/PEG질량비복합점결제대LFP정겁적전화학성능적영향，C-CTS/PEG적우화중량비위3∶1，차시LFP정겁표현출최가적순배은정성。전지재0.5 C하충방전측시，140차순배후용량보지솔위99%。채용차시소묘량열법（DSC）、부리협홍외광보의（FTIR）화용해실험등연구C-CTS/PEG여XR-104적교련반응，당교련제XR-104적중량위C-CTS적1%시，LFP정겁표현출최가적전화학성능。
Carboxymethyl chitosan (C-CTS) was modified in two different methods as water soluble binder for LiFePO4 (LFP) cathode: (1) blending C-CTS with polyethylene oxide (PEG) to prepare the composite binder (C-CTS/PEG), (2) using trimethylolpropane tris(2-methyl-1-aziridinepropionate) (XR-104) as a crosslinker in C-CTS/PEG blending system to prepare crosslinkable water soluble binder (C-CTS/PEG/XR-104). The electrochemical performances of LFP cathode with C-CTS/PEG composite binders of different weight ratios were investigated. LFP cathode exhibited the best cycle stability when using an optimized weight ratio of 3:1 for C-CTS/PEG binder, showing a capacity retention of 99%after 140 cycles at 0.5 C. Differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR) and dissolution experiments were employed to study the cross-linking reaction between C-CTS/PEG and XR-104. It was found that LFP cathode with optimal amount of 1%XR-104 crosslinker showed the best rate capability.