Abstract: A film bulk acoustic resonator and a fabricating method thereof is provided. The fabricating method includes: fabricating a lower electrode on a first surface of an SOI substrate; forming piezoelectric layers on the first surface of the SOI substrate and the lower electrode; forming top electrodes on the piezoelectric layers; processing an air cavity on a second surface of the SOI substrate, wherein the second surface and the first surface are oppositely arranged. The fabricating method simplifies a preparation process of FBAR, a quality of a AlN film crystal grown though the fabrication method is high, an improvement of a device performance is facilitated, and meanwhile a thickness of a top silicon is controlled through a position of a silicon injected oxygen isolation to regulate a frequency of the film bulk acoustic resonator.

Abstract: A laminar electrostatic eliminator circuit includes a main control module, a control instruction sending unit, a first driving circuit, a first boost circuit, a second driving circuit, and a second boost circuit. A signal input terminal of the main control module is connected to an instruction sending terminal of the control instruction sending unit, a control terminal of the main control module is connected to an input terminal of the first driving circuit and an input terminal of the second driving circuit.

Abstract: A method of forming a high energy density composite cathode material is disclosed. The method includes providing a lithium-rich manganese layered oxide (LRMO), coating the LRMO with a TiO2 precursor, and ball-milling the TiO2 coated LRMO with LiH to form a LixTiO2 coated LRMO composite, wherein x is less than or equal to 1 and greater than zero.

Abstract: A method of forming a high energy density composite cathode material is disclosed. The method includes providing a lithium-rich manganese layered oxide (LRMO), coating the LRMO with a TiO2 precursor, and ball-milling the TiO2 coated LRMO with LiH to form a LixTiO2 coated LRMO composite, wherein x is less than or equal to 1 and greater than zero.

Abstract: Systems and control devices for charging and discharging a lithium-ion battery and relevant methods are provided. A variable frequency triggering oscillation charge-discharge device constructs an oscillation loop with a lithium-ion battery using an inherent impedance characteristic of the lithium-ion battery to charge and/or discharge the lithium-ion battery in the form of an oscillation current generated by the oscillation loop, to avoid direct current (DC) charge-discharge for the lithium-ion battery or battery pack that causes polarization and lithium precipitation of the lithium. Accordingly, the lithium-ion battery has longer battery life, higher charging threshold voltage, higher charge, and controlled internal temperature increase. Thus, the suitable temperature range for the lithium-ion battery is broadened.

Abstract: Systems and control devices for charging and discharging a lithium-ion battery and relevant methods are provided. A variable frequency triggering oscillation charge-discharge device constructs an oscillation loop with a lithium-ion battery using an inherent impedance characteristic of the lithium-ion battery to charge and/or discharge the lithium-ion battery in the form of an oscillation current generated by the oscillation loop, to avoid direct current (DC) charge-discharge for the lithium-ion battery or battery pack that causes polarization and lithium precipitation of the lithium. Accordingly, the lithium-ion battery has longer battery life, higher charging threshold voltage, higher charge, and controlled internal temperature increase. Thus, the suitable temperature range for the lithium-ion battery is broadened.