CHARGE-DISCHARGE CHARACTERISTICS OF MESOPHASE-PITCH-BASED CARBON-FIBERS FOR LITHIUM CELLS
CHARGE-DISCHARGE CHARACTERISTICS OF MESOPHASE-PITCH-BASED CARBON-FIBERS FOR LITHIUM CELLS
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DOI：
10.1149/1.2221044
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发表时间：
1993-02-01
影响因子：
3.9
通讯作者：
INAGAKI, M
中科院分区：
文献类型：
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作者：
IMANISHI, N;KASHIWAGI, H;INAGAKI, M
中间相沥青基碳纤维在高温(2600或2800摄氏度)下进行热处理，并作为锂二次电池的阳极进行测试。使用了四种类型的碳纤维，其横断面图是：带有楔形的径向织构(A类)、具有细小之字层的径向织构(B类)、双重织构(C类)和同心织构(D类)。在A型碳纤维中首次嵌锂后，锂不能被脱嵌。在锂插层过程中，A型纤维的结构被破坏。其他三种类型的碳纤维在第一次循环中表现出良好的可充性，但在3次循环后表现出不同的行为。径向取向碳纤维(B型)的锂插层和脱嵌容量最大。X射线分析表明，在插层和脱插层循环过程中，晶格沿c轴方向发生了可逆的变化。
Mesophase-pitch-based carbon fibers were heat-treated at high temperatures (2600 or 2800-degrees-C) and examined as anodes for lithium secondary batteries. Four types of carbon fibers were used whose cross-sectional views are: a radial texture with wedge (type A), a radial texture with fine zigzag layers (type B), a double texture (type C), and a concentric texture (type D). Lithium could not be deintercalated after the first lithium intercalation in the type A carbon fiber. The structure of the type A fiber was destroyed during lithium intercalation. The other three types of carbon fibers showed good rechargeability on the first cycle, but demonstrated different behavior after 3 () cycles. The highest lithium intercalation and deintercalation capacity was observed for the radially oriented carbon fiber (type B). The x-ray results showed a reversible change in the lattice along the c-axis during the intercalation and deintercalation cycle.