NANOMYTE® Cathode & Anode Tapes
Our battery materials are produced through a scalable and economical solid state synthesis process, which is adaptable to different materials compositions and particle morphologies. NEI supplies its Li-ion battery cathode & anode materials as both powders and cast electrode tapes. Our standard tape is cast on 5 inches x 10 inches aluminum (or copper) foil and coated on one side, with an 80% active material loading but can be customized to accommodate different active material loadings, coating thickness, binder type (aqueous/non-aqueous), and binder content, as well as choice of current collector.
Lithium-ion Anode Tapes
NANOMYTE® Anode Electrode Sheets
Anode materials are the negative electrode in lithium-ion batteries and are paired with cathode materials in a lithium-ion cell. The anode materials in lithium-ion cells act as the host where they reversibly allow lithium-ion intercalation / deintercallation during charge / discharge cycles. General criteria for selection of suitable intercalation-based anode materials include (i) low first cycle irreversible loss, (ii) high coulombic efficiency, (iii) fast lithium-ion diffusion into and out of the anode, (iv) high ionic and electronic conductivity, (v) minimum structural changes upon charge and discharge, (vi) high specific capacity (mAh/g), and (vii) the ability to form and maintain a stable SEI (Solid Electrolyte Interface) layer upon cycling. In addition to standard anode materials, NEI can also provide customized anode materials based on the customer’s needs.
Lithium titanate (Li4Ti5O12,) is an electrode material with exceptional electrochemical stability, often used as the anode in lithium-ion batteries for applications that require high rate, long cycle life, and high efficiency. LTO-based batteries are considered safer and have a wider operating temperature range.
In addition to lithium titanate, NEI provides two other types of anode electrode sheets – graphite and activated carbon.
NANOMYTE® Cathode Electrode Sheets
Cathode materials are the main component of Li-ion batteries; they determine the energy density of a cell through cell voltage and / or capacity. Lithium ion batteries are typically based on intercalation / deintercallation compounds, where lithium ions provided by the cathode are inserted into the host lattice (anode) during charge and extracted during discharge, with a minimal structural change in the host material. The choice of cathode material with a particular chemistry depends on various factors, including cell voltage, capacity, energy and power capabilities, cycle life, and temperature of operation. NEI provides a variety of cathode materials that are suitable for a wide range of applications. We also provide customized cathode materials based on customer needs.
Lithium manganese oxide (LiMn2O4) is a cathode material with a spinel structure, which allows the material to be discharged at high rates. LMO-based batteries are most suited for use in high rate applications.
Lithium nickel cobalt aluminum oxide (LiNi0.8Co0.15Al0.05O2) is a cathode material that provides higher capacity than LiCoO2 when both are charged to 4.2 / 4.3V. NCA-based batteries are most suited for use in moderate rate applications that require high energy density.
Lithium manganese nickel oxide / spinel (LiMn1.5Ni0.5O4) is a cathode material that can be charged at high voltage (5V). Due to the high potential, the material has a higher energy density compared to lithium cobalt oxide and lithium iron phosphate. LMNO-based batteries can be used in high rate applications.