作为水系锌锰电池的重要组成部分之一，电解液不仅是离子传输的载体，更是参与电化学反应的活性物质，对于提升电池循环寿命和功率密度等性能具有重要影响。研究电解液的热力学性质有助于在不同工作条件下确定最优电解液的组成和质量摩尔浓度，优化电池设计，提升电池的性能。目前，已有对VOSO₄电解质水体系的研究，但仍缺乏对MnSO₄电解质的相关研究。在283.15~318.15 K条件下，测量了质量摩尔浓度为0.001~0.1 mol/kg的硫酸锰稀溶液电导率。应用Fuoss法和Shedlovsky法，获得了［MnSO₄］⁰离子对的极限摩尔电导率（Λ₀）和解离常数（K_d）。与其他二价金属离子相比，计算结果较为可靠。根据K_d与温度的经验方程进行拟合，计算得到解离过程的热力学函数，并深入分析Mn²⁺和SO₄^2-在解离过程中与水分子的水化作用。［MnSO₄］⁰离子对解离的关键步骤是水分子被固定在Mn²⁺的水化层周围，使体系秩序性增强的过程。该研究为分析锰电解液中离子作用结构，优化电解液性能提供基础理论支撑。

As one of the important components in aqueous Zn-Mn battery（AZMB），the electrolyte is not only a carrier of ion transport but also an active substance involved in electrochemical reactions，which has an important impact on AZMB cycle life and power density.The study of thermodynamic properties is conducive to determine optimal composition and molality under different working conditions in electrolytes，which optimizes battery design and improves performance.There have been research on the water system of VOSO₄ electrolytes，but there is a lack of relevant studies on MnSO₄ electrolytes.In this paper，the conductivity of manganese sulfate dilute solution with a molality range of 0.001~0.1 mol/kg was measured at 283.15~318.15 K.Limiting molar conductivity（Λ₀） and dissociation constant（K_d） of ［MnSO₄］⁰ ion pair in the dissociation process were obtained from the Fuoss method and Shedlovsky method.The calculative data was reliable compared with other divalent ions.The thermodynamic function of the dissociation process was obtained by fitting the equation of K_d and temperature，and the ionic interaction of Mn²⁺，SO₄^2-，and water molecules during the dissociation process was deeply discussed.The key step of the dissociation of ［MnSO₄］⁰ ion pair was the process in which water molecules were fixed around the hydration layer of Mn²⁺ to enhance the order of the system.This study provided basic theoretical support for analyzing the ionic structure and optimizing performance in manganese electrolytes.