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Battery Charge and Discharge Curves I: Time-Current/Voltage Curves 1. Constant Current (CC)

Introduction to Battery Charge and Discharge Curves 2026

April 8, 2026

Since lithium-ion batteries (such as cylindrical or pouch cells) typically operate within closed systems to ensure cycling stability and safety, their internal physicochemical states remain difficult to observe directly. Consequently, external electrochemical testing is essential for characterizing and estimating internal cell information. During the charging and discharging process, cell voltage fluctuates according to the Depth of Discharge (DOD). By recording parameters such as voltage, capacity, State of Charge (SOC), and time, we can plot charge-discharge curves that reflect the battery's electrochemical characteristics. These curves contain critical data regarding polarization phenomena, phase transitions, and kinetic limitations, serving as the foundation for analyzing battery performance. The following sections introduce several common types

Lithium Dendrites

Lithium Dendrite Growth Mechanism and Suppression Methods 2026

March 31, 2026

Lithium Dendrite Growth Mechanism and Suppression Methods Lithium metal is considered the ideal anode material for next-generation high-energy-density batteries, such as Lithium-Sulfur and Lithium-Air batteries. This is due to its extremely high specific capacity, low reduction potential, and low density. However, the growth of lithium dendrites severely limits its practical application. Test your battery's performance with Neware's high-precision battery testing solution. Lithium dendrites can pierce the separator, leading to short circuits. They also destroy the Solid Electrolyte Interphase (SEI) film. This results in the accumulation of "dead lithium," capacity fade, and serious safety issues. Today, we will discuss the growth mechanism, influencing factors, characterization techniques, and suppression strategies of lithium

Sulfide-based All-Solid-State Batteries

Sulfide-based All-Solid-State Batteries: Core Challenges and Breakthroughs in Materials and Interfaces 1

March 30, 2026

The massive expansion of the EV market has pushed lithium-ion batteries beyond the 300 Wh/kg threshold, bringing costs down to nearly $100 per kWh. Despite this progress, conventional batteries with liquid electrolytes are hitting a plateau in terms of energy density and safety. All-solid-state batteries are now seen as the core technology for the next generation of EVs, offering higher energy density, better safety, and longer life. In particular, sulfide-based all-solid-state batteries are gaining immense traction because their solid electrolytes can match the high ionic conductivity of liquid systems, making them a top research priority globally. However, the practical application of sulfide-based ASSBs still faces multiple challenges. Technical bottlenecks spanning

Figure 4. Electrochemical Impedance Spectroscopy (EIS) of anode symmetric cells at different SOC: (a) 100% SOC-Pristine symmetric cell; (b) 100% SOC–0% SOC symmetric cell; (c) Equivalent circuit model for impedance analysis.

Anode Symmetric Cells for Battery Capacity Loss Analysis: A Step-by-Step Guide 2026

March 26, 2026

Insights from "Lithium Battery Frontier" – 锂电前沿 Abstract： Anode symmetric cells were assembled using two identical electrodes, one in a lithium state and another one in a delithiated or pristine state. The charging-discharging regime of graphite symmetric cells were studied. And the electrochemical impedance spectrum of different state of charge(SOC)was also analyzed. A sloping curve from -1 V to 0.5 V was only observed during the first charging curve of the 100% SOC-Pristine graphite symmetric cell. The voltage platform was suggested to the formation of SEI layer in the pristine graphite surface. The impedance of symmetric cell in 0% SOC and 100% SOC reached the maximum. While the impedance achieved

Figure 3 Design and performance analysis of high-current formation strategy

Real-time visualization of SEI formation: Reducing battery formation time from 20 hours to 1 hour

March 20, 2026

Real-time visualization of SEI formation: Reducing battery formation time from 20 hours to 1 hour Source: WeChat Official Account "Lithium Dream Life" In the lithium-ion battery manufacturing process, there is a critical yet long-standing "invisible" step—Battery Formation. This stage directly determines a battery’s cycle life, safety, and consistency. However, it typically requires 10 to 20 hours or even longer to complete, representing a major source of manufacturing costs and safety risks. Recently, a collaborative research team from the University of Texas at Austin, Purdue University, and General Motors (GM) achieved a breakthrough by directly observing the formation of the Solid Electrolyte Interphase (SEI) under real battery operating conditions for the

Two of the 5 most common reference electrodes in electrochemistry: Saturated calomel electrode (SCE)

Top 5 Most Common Reference Electrodes in Electrochemistry

March 19, 2026

Top 5 Most Common Reference Electrodes in Electrochemistry Source: WeChat Official Account "Electrochemistry and Electrocatalysis" One of the 5 most common reference electrodes in electrochemistry: Standard hydrogen electrode (SHE / NHE) Composition: A platinum sheet coated with platinum black is immersed in an acidic solution with a hydrogen ion activity of 1 mol/L, and pure hydrogen gas at a pressure of 1 atm is continuously introduced. Characteristics: It is the absolute standard for all electrode potentials. Its standard electrode potential is arbitrarily defined as 0.000 V at any temperature. Applicable Systems: Primarily used for theoretical research and calibration of other reference electrodes. Due to the need for a continuous supply

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