An electrode material for a lithium ion secondary battery and method of forming the same, the electrode material including composite particles, each composite particle including: a primary particle including an electrochemically active material; and an envelope disposed on the surface of the primary particle. The envelope includes turbostratic carbon having a Raman spectrum having: a D band having a peak intensity (I.sub.D) at wave number between 1330 cm.sup.−1 and 1360 cm.sup.−1; a G band having a peak intensity (I.sub.G) at wave number between 1530 cm.sup.−1 and 1580 cm.sup.−1; and a 2D band having a peak intensity (I.sub.2D) at wave number between 2650 cm.sup.−1 and 2750 cm.sup.−1. In one embodiment, a ratio of I.sub.D/I.sub.G ranges from greater than zero to about 1.1, and a ratio of I.sub.2D/I.sub.G ranges from about 0.4 to about 2.

A method of fabricating a flexible battery comprises forming a first substrate on a first release liner, forming at least one current collector layer on each of the first and second substrate, forming an anode side of the battery by forming an anode on the current collector of the first substrate, forming a cathode side of the battery by forming a cathode on the current collector of the second substrate, depositing electrolyte on one or both of the anode and cathode, adhering and sealing the anode side and cathode side together such that the anode and cathode face one another with the electrolyte In between, and removing the flexible battery from the release liners. The battery may be a primary battery or a secondary battery. The method may be implemented using a roll-to-roll process.

The present disclosure provides a cobalt-free lamellar cathode material and a method for preparing the cobalt-free lamellar cathode material, and a lithium ion battery. The cobalt-free lamellar cathode material is of a core-shell structure, and a material forming an outer shell of the core-shell structure comprises titanium nitride and a material forming an inner core of the core-shell structure does not comprise cobalt and is of a monocrystal structure. According to the cobalt-free lamellar cathode material provided by the present disclosure, the surface of the cobalt-free inner core is coated with highly conductive titanium nitride, such that while the price cost of the cathode material is lowered, the rate capability of the cathode material can be improved, and thus the rate capability of the cobalt-free cathode material is better.

A solid-state electrochemical cell that cycles lithium ions. The electrochemical cell may include a solid-state electrolyte defining a first major surface and a negative electrode defining a second major surface. The electrochemical cell may also include an interfacial layer disposed between the first major surface of the solid-state electrolyte and the second major surface of the solid electrode. The interfacial layer may include an ion-conductor disposed in an organic matrix.

Provided is a secondary battery electrode having a sufficient peel strength between a base material and a material mixture layer without the need for increasing a binder addition amount. A secondary battery electrode includes a base material and a material mixture layer made of an electrode material mixture containing an active material and a binder. The material mixture layer has a multilayer structure of at least two or more layers stacked on the base material. In the multilayer structure of the material mixture layer, a first material mixture layer stacked on a surface of the base material has a higher contained binder concentration than those of other material mixture layers. The thickness of the first material mixture layer is preferably equal to or less than the total thickness of the other material mixture layers.

One example of the present invention provides a negative electrode material. Such a negative electrode material may comprise lithium titanium oxide-based particles and a graphene quantum dot coating layer doped with nitrogen that is positioned on the lithium titanium oxide-based particles.

A main object of the present disclosure is to provide a method for producing a slurry in which chronological aggregation of an oxide active material is restrained. The present disclosure achieves the object by providing a method for producing a slurry containing an oxide active material, a solid electrolyte, a dispersion medium, and at least one of a conductive material and a binder, the method comprising: a dispersion preparing step of preparing a dispersion containing the oxide active material, the solid electrolyte, and the dispersion medium; and an adding step of adding at least one of the conductive material and the binder to the dispersion; wherein when Hansen parameters (σH) of the oxide active material, the solid electrolyte, and the dispersion medium are respectively regarded as σHa, σHb, and σHc, relationship of σHa−σHc≥5, and relationship of σHa>σHb>σHc are satisfied.

Battery electrode compositions and methods of fabrication are provided that utilize composite particles. Each of the composite particles may comprise, for example, a high-capacity active material and a porous, electrically-conductive scaffolding matrix material. The active material may store and release ions during battery operation, and may exhibit (i) a specific capacity of at least 220 mAh/g as a cathode active material or (ii) a specific capacity of at least 400 mAh/g as an anode active material. The active material may be disposed in the pores of the scaffolding matrix material. According to various designs, each composite particle may exhibit at least one material property that changes from the center to the perimeter of the scaffolding matrix material.

The present disclosure is directed to methods of securing battery tab structures to binderless, collectorless self-standing electrodes, comprising electrode active material and carbon nanotubes and no foil-based collector, and the resulting battery-tab secured electrodes. Such methods and the resulting battery tab-secured electrodes may facilitate the use of such composites in battery and power applications.

Provided herein is a method of making a conductive network by combining uncoated carbon nanotubes and carbon nanotubes coated with an electroactive substance to create an electrically conductive network; and redistributing at least a portion of the electroactive substance. Also provided herein is an electrically conductive network with an active material coating; first carbon nanotubes coated with the active material coating; and second carbon nanotubes partially coated with the active material coating, wherein at least a portion of the surfaces of the second carbon nanotubes directly contact surfaces of other second carbon nanotubes without the active material coating between these second carbon nanotubes, and wherein the first carbon nanotubes and the second carbon nanotubes are entangled to form an electrically conductive network.