Abstract: In various embodiments, an electrochemical cell is provided. The electrochemical cell may include a first electrode including a first metal oxide layer, the first layer having a first surface. The electrochemical cell may further include a second electrode including a second metal oxide layer, the second layer having a second surface, the second layer parallel to the first layer. The electrochemical cell may also include an electrolyte in direct physical contact with the first electrode and the second electrode. The first surface may be in direct physical contact to the second surface.

Abstract: The present disclosure provides a phosphate framework electrode material for sodium ion battery and a method for synthesizing such electrode material. A surfactant and precursors including a sodium precursor, a phosphate precursor, a transition metal precursor are dissolved in a solvent and stirred for sufficient mixing and reaction. The precursors are reacted to yield a precipitate of particles of NaxAbMy(PO4)zXn compound and with the surfactant attached to the particles. The solvent is then removed and the remaining precipitate is sintered to crystallize the particles. During sintering, the surfactant is decomposed to form a carbon network between the crystallized particles and the crystallized particles and the carbon matrix are integrated to form the electrode material.

Abstract: In various embodiments, an electrochemical cell is provided. The electrochemical cell may include a first electrode including a first metal oxide layer, the first layer having a first surface. The electrochemical cell may further include a second electrode including a second metal oxide layer, the second layer having a second surface, the second layer parallel to the first layer. The electrochemical cell may also include an electrolyte in direct physical contact with the first electrode and the second electrode. The first surface may be in direct physical contact to the second surface.

Abstract: The present disclosure provides a phosphate framework electrode material for sodium ion battery and a method for synthesizing such electrode material. A surfactant and precursors including a sodium precursor, a phosphate precursor, a transition metal precursor are dissolved in a solvent and stirred for sufficient mixing and reaction. The precursors are reacted to yield a precipitate of particles of NaxAbMy(PO4)zXn compound and with the surfactant attached to the particles. The solvent is then removed and the remaining precipitate is sintered to crystallize the particles. During sintering, the surfactant is decomposed to form a carbon network between the crystallized particles and the crystallized particles and the carbon matrix are integrated to form the electrode material.