Abstract: The present invention provides, in part, electrodes (e.g., cathodes) comprising electroactive materials (e.g., cathode active materials), a primary coating comprising a high entropy metal oxide (HEO), and optionally a secondary coating layer comprising an ionic and electronic conductive polymer, as well as an energy storage device thereof, and methods for making the same.

Abstract: The present invention provides, in part, an electrochemical energy storage device comprising a metal anode, a separator, a high-mass-loading selenium-sulfur cathode and a lean electrolyte. In particular, the electrolyte described herein employs active solid-electrolyte interphase engineering salts and features unique solvating structure. The combination of high-mass-loading S cathode and the particular electrolytes can enhance one or more of the following cell properties: energy density, cycling stability, safety, and working temperature window.

Abstract: An electrochemical device includes an anode containing a phosphorus-carbon composite including a conductive carbon matrix and nano-sized phosphorus particles, wherein the nano-sized phosphorus particles are uniformly dispersed on the surface and/or pores of the carbon matrix.

Abstract: A [PxSbyMz]p/[carbon]q composite where x, y, and z represent atomic percentage values and are x>0; y>0; and z?0, M is an electrically conductive metal, p and q represent the weight percentage values of the composite wherein p and q are in the range of 0-100%, and is p>0.

Abstract: A [PxSbyMz]p/[carbon]q composite where x, y, and z represent atomic percentage values and are x>0; y>0; and z?0, M is an electrically conductive metal, p and q represent the weight percentage values of the composite wherein p and q are in the range of 0-100%, and is p>0.

Abstract: A lithium ion battery includes a lithium negative electrode, a positive electrode, a separator, and an electrolyte that includes a poly(alkyleneoxide) siloxane and a salt at a concentration of about 2 M to about 10 M. The concentration of the salt in the electrolyte is determined as mols of salt divided by volume of the electrolyte, without considering the volume change of the electrolyte due to dissolution of the salt, and is sufficiently high to suppress or prevent side reactions between the lithium metal and the electrolyte, thereby enabling a highly reversible lithium plating-stripping process to proceed.

Abstract: An electrochemical device includes an anode containing a phosphorus-carbon composite including a conductive carbon matrix and nano-sized phosphorus particles, wherein the nano-sized phosphorus particles are uniformly dispersed on the surface and/or pores of the carbon matrix.

Abstract: An electrochemical device includes an anode containing a phosphorus-carbon composite including a conductive carbon matrix and nano-sized phosphorus particles, wherein the nano-sized phosphorus particles are uniformly dispersed on the surface and/or pores of the carbon matrix.