Carbon materials for silicon-based anode in lithium-ion batteries

Electrode Materials for lithium-ion batteries

Lithium-ion Battery

Lithium-ion Battery works on the principle of generating electricity by moving lithium (Li) ions between the anode (+) and cathode (-).
Lithium-ion batteries can be reused many times through charging and discharging, and are used as an energy source for eco-friendly mobility, including electric vehicles, IT devices, and various home appliances.
cathode material

Cathode material is the positive electrode of the battery, which acts as the source of lithium in a lithium-ion battery and determines the capacity and average voltage.
Anode material

Anode material is responsible for storing and releasing lithium ions, allowing current to flow through the external circuitry and determining the charge rate and life of the secondary battery.

Carbon Support for Silicon-Based Anode in lithium-ion batteries

Manufacturing process of Carbon Support for silicon-based Anode Material

Heat treatment process: Low temperature heat treatment process for high specific surface area premium activated carbon and high temperature heat treatment process for high hardness and high conductivity porous carbon materials
Grinding/classification process: Grinding/classification process for particle size control to meet the demand
Activation process: Manufacturing porous carbon materials of various specifications through physical/chemical activation

Carbon support for silicon-based anode materials: Porous carbon material produced by SMARTKOREA is utilized as a silicon-based anode material for lithium-ion batteries for high capacity, high output, and high stability.

Application of Porous Carbon as Electrode Materials for lithium-ion batteries

Features of silicon composites for lithium-ion batteries using porous carbon materials

Porous carbon pores provide a surface for silicon deposition and control the expansion of silicon
Controlling the amount of silicon deposition through pore control enables the realization of high capacity/high power anode materials
Stability of the electrode can also be achieved by controlling silicon volume expansion

Features of silicon composites for lithium-ion batteries using porous carbon materials

Type1

Type2

Type3

Characterization results of lithium-ion battery silicon composite cathode materials using porous carbon materials

Comparison data before and after silicon deposition

Silicon electrode thickness variation measurement data

Electrochemical characterization results of Lithium-ion Battery Silicon Composite Cathode Materials with Porous Carbon Materials

Electrochemical characterization results of carbon support and silicon composite

Cyclic Voltammetry (CV) test and Charge-Discharge evaluation results data

Silicon composite anode material initial capacity and initial efficiency evaluation results

Porous carbon-based SI initial capacity and initial efficiency evaluation results

Deposition rate : 28.9%

SI deposition rate (%) evaluation results of silicon composite anode materials

Deposition rate : 15.1%

Electrode expansion rate evaluation result before/after Charge-Discharge

Conductive materials and binders for lithium-ion batteries

Necessity of applying pitch-based carbon material as electrode materia

Problems with existing materials

Existing polymeric binders have limited battery life due to low conductive properties
High dependence on importing binders for electrodes and conductive materials

Features of the developed material

Localization of materials for existing electrodes that are highly dependent on imports
Price competitiveness by utilizing low-cost petroleum residue
Superior conductivity (up to 90 S/cm) and increased capacity compared to existing carbon black-based conductive materials (20 S/cm)
Expected to improve battery life characteristics due to superior conductivity over existing binders

Petroleum-based Pitch-based Conductive Material / Binders Manufacturing Process Diagrams