Effect of CNTs/Gr composite conductive additive loading and ratio on cathode slurry dispersion characteristics

WANG Zhilong; LI Bingjia; YANG Xiao; LU Jianhang; ZHANG Jiatan; ZHU Hongzhou; SUN Bo; ZHAO Tong; IRFAN Bahiuddin

doi:10.11949/0438-1157.20260752

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Effect of CNTs/Gr composite conductive additive loading and ratio on cathode slurry dispersion characteristics

更新时间：2026-08-19

- Effect of CNTs/Gr composite conductive additive loading and ratio on cathode slurry dispersion characteristics
- CIESC Journal (2026)
- 作者机构：
  
  1.西安理工大学机械工程学院，陕西西安 710048
  2.新疆工程学院机电与自动化学院，新疆和田 848000
  3.加查马达大学机械工程系，印度尼西亚日惹 55281
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20260752
  CLC：
- Received：02 June 2026，
  
  Revised：2026-08-18，
  
  Accepted：19 August 2026，
- 稿件说明：
移动端阅览
WANG Zhilong, LI Bingjia, YANG Xiao, et al. Effect of CNTs/Gr composite conductive additive loading and ratio on cathode slurry dispersion characteristics[J/OL]. CIESC Journal, 2026.
DOI：

WANG Zhilong, LI Bingjia, YANG Xiao, et al. Effect of CNTs/Gr composite conductive additive loading and ratio on cathode slurry dispersion characteristics[J/OL]. CIESC Journal, 2026. DOI： 10.11949/0438-1157.20260752.

摘要

复合导电剂是决定锂离子电池正极浆料导电网络构筑质量与分散特性的核心组分，其总含量与复配比例直接影响电池的电子传输效率与循环稳定性。本文以钴酸锂(LiCoO₂)正极体系为研究对象，设置

com1

=0.3%、

com2

=0.5%、

com3

=0.7%、

com4

=0.9% 共 4 个碳纳米管 / 石墨烯(CNTs/Gr)复合导电剂总含量梯度，每个梯度匹配

CNTs

=0:5、1:4、2:3、3:2、5:0共 6 组 CNTs 与 Gr 质量配比，通过电化学阻抗谱(EIS)系统研究了复合导电剂参数对正极浆料分散特性的影响规律。通过实验得出：当复合导电剂总含量为 0.5%、CNTs 与 Gr 质量比为

CNTs

= 4:1 时，正极浆料综合性能最优，此时浆料电子传导阻抗最低、导电网络连续性最好、分散均匀性与长期沉降稳定性最佳。在此基础上建立了正极浆料的流电耦合数值模型，开展了不同导电剂参数下浆料阻抗特性与导电网络演化的仿真分析，仿真结果与实验测试结果高度一致，验证了复合导电剂对浆料分散特性调控规律的准确性与可靠性。本文明确了 CNTs/Gr 复合导电剂的最优配比与含量阈值，为高性能锂离子电池正极浆料的导电体系优化设计提供了系统的理论依据与可落地的工艺指导。

Abstract

Composite conductive additives are the core components that determine the construction quality of conductive network and dispersion characteristics of lithium-ion battery cathode slurry. Their total loading and mixing ratio directly affect the electron transport efficiency and cycling stability of the battery. In this paper

taking lithium cobalt oxide (LiCoO₂) cathode

system as the research object

we set 4 total loading gradients of carbon nanotube/graphene (CNTs/Gr) composite conductive additives (

com1

=0.3%、

com2

=0.5%、

com3

=0.7%、

com4

=0.9%)

and matched 6 groups of CNTs to Gr mass ratios

CNTs

=0:5、1:4、2:3、3:2、5:0 for each gradient. The influence law of composite conductive additive parameters on the dispersion characteristics of cathode slurry was systematically studied through electrochemical impedance spectroscopy (EIS). It was concluded through experiments that when the total loading of composite conductive additive is

com2

=0.5% and the mass ratio of CNTs to Gr is

CNTs

=4:1

the cathode slurry has the optimal comprehensive performance

with the lowest electron conduction impedance

the best continuity of conductive network

and the optimal dispersion uniformity and long-term sedimentation stability. On this basis

a hydrodynamic-electric coupling numerical model of cathode slurry was established

and the simulation analysis of slurry impedance characteristics and conductive network evolution under different conductive additive parameters was carried out. The simulation results are highly consistent with the experimental test results

which verifies the accuracy and reliability of the regulation law of composite conductive additives on the dispersion characteristics of slurry. This paper clarifies the optimal ratio and loading threshold of CNTs/Gr composite conductive additives

and provides a systematic theoretical basis and practicable process guidance for the optimal design of conductive system for high-performance lithium-ion battery cathode slurry.

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references

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