Shenzhen University

Sichuan University

Gem Co., Ltd.

Jingmen Gem Co., Ltd

Cong Li

Ling Chen

Zhiqiang He

Mingzhong Gao

Heping Xie

Jun Guo

Zetian Zhang

Zhilong Zhang

Yiqiang Lu

Ru Zhang

Jianbo Zhu

Cunbao Li

Zhiyi Liao

Kaihua Xu

Kun Zhang

Jianan Li

Bo Liu

Bo Yu

Kang Chen

Le Zhao

Mingqing Yang

Nianhan Wu

Zhenkang Jiang

Yunqi Hu

Wenguang Wang

Liangjiao Fan

Haibo Sun

Xiaofei Xue

Zhaojian Sun

Provided are a cathode material for sodium-ion batteries, a preparation method therefor, and an application thereof, and the preparation method comprises the following steps: (1) mixing a nickel source, a manganese source, and a magnesium source to obtain a ternary salt solution, adding the ternary salt solution, a precipitating agent, a complexing agent, a boron source solution, and an organic additive to a reaction vessel in parallel flow, and performing a reaction to obtain a B-doped radially-packed hydroxide precursor; and (2) mixing the B-doped radially-packed hydroxide precursor obtained in step (1) with a sodium source, and performing sintering treatment to obtain the cathode material for sodium-ion batteries. In the present application, the chemical composition (B-doping) and microscopic morphology (radial-packed arrangement of primary particles) of the cathode material are synergistically modified and regulated by optimizing the co-precipitation process, so as to improve the element distribution uniformity, structure stability, cycle performance, rate capability, and production efficiency of the cathode material for sodium-ion batteries simultaneously.

Cathode material for sodium-ion batteries, preparation method therefor, and application thereof

An internal blowout-prevention gas-retaining connector has a body mounted at the bottom of a drill pipe. The body includes a valve pipe section and a connecting pipe section arranged from top to bottom. The bottom of the valve pipe section is inserted into the top of the connecting pipe section. The blowout-prevention valve seat is provided at a bottom end of the valve pipe section while a blowout-prevention valve bonnet is provided on a bottom surface of the valve pipe section. The edge of the blowout-prevention valve bonnet is rotatably connected to a bottom surface edge of the valve pipe section. A torsion spring is provided on a bottom surface of the blowout-prevention valve bonnet. One end of the torsion spring is connected to the bottom surface of the blowout-prevention valve bonnet while the other end is connected to the inner wall of the connecting pipe section.

Internal blowout-prevention gas-retaining connector for mine

A driving system for a core drilling rig has a driving motor. The driving motor has an outer rotor and an inner stator, and mutually-matched convex ribs are provided on the inner wall of the outer rotor and the outer wall of the inner stator. The outer rotor and the inner stator are in clearance fit. A clearance between the outer rotor and the inner stator is a driving liquid channel. The length of the outer rotor is less than that of the inner stator. The outer rotor is provided between the front and rear ends of the inner stator. The outer rotor is connected to an outer cylinder. The rear end of the inner stator is connected to a coupling.

Driving system for core drilling rig

A drilling fluid channel structure of a core drilling rig includes a fluid channel activation module, a pressure relief module, a flow diverging and blocking module, a driving fluid channel and a cooling fluid channel. The fluid channel activation module, the pressure relief module and the flow diverging and blocking module are connected sequentially from the rear to the front. The driving fluid channel and the cooling fluid channel are connected at the rear side thereof to the flow diverging and blocking module. The driving fluid channel includes a driving section located between a stator and a rotor of a driving motor. The driving fluid channel is provided with a driving fluid outlet at the front side of the driving section. The cooling fluid channel passes through a layer disposed between an integrity-preserving compartment and an outer barrel.

Drilling fluid channel structure of core drilling rig

A core sampling and preservation system comprises the following sequentially connected modules: a drive module (), a preservation module () and a core sampling module (). The core sampling module () comprises a core drilling tool and a core sample storage compartment. The preservation module () comprises a core sample preservation container. The drive module comprises a core drill having a liquid channel. The core sample preservation container comprises an inner core barrel (), an outer core barrel () and an energy storage device (). The outer core barrel () is sleeved onto the inner core barrel (). An upper end of the inner core barrel () is in communication with a liquid nitrogen storage tank (). The liquid nitrogen storage tank () is positioned inside the outer core barrel (). The energy storage device () is in communication with the outer core barrel (). The outer core barrel () is provided with a butterfly valve (). The system facilitates preserving a core at in-situ conditions, and has an increased drilling speed, thereby enhancing core sampling efficiency.

Core sampling and preservation system

A system for the in-situ retained coring of a rock sample has a driving module (), a retaining module (), and a coring module () which are connected in sequence. The coring module () includes a rock core drilling tool and a rock core sample storage cylinder, the retaining module () includes a rock core sample retaining compartment. The driving module includes a coring drill machine that has a drill machine outer cylinder unlocking mechanism. The rock core drilling tool includes a coring drill tool, a core catcher (), and an inner core pipe (). The coring drill tool has an outer core pipe () and a hollow drill bit (). The rock core sample retaining compartment has an inner coring cylinder (), an outer coring cylinder (), and an energy accumulator ().

System for in-situ retained coring of rock sample

Disclosed is a guiding and injecting integrated mechanism for continuous conduit, belonging to underground exploration technical field. The mechanism comprises a pair of chain wheel and chain clamping assemblies used for clamping conduit and pulling conduit to go down or out of well. A conduit guiding channel for conduit to pass through is formed between the pair of chain wheel and chain clamping assemblies, and an inlet and an outlet of the conduit guiding channel are not situated in line. The conduit guiding channel is arc-shaped and each of the two chain wheel and chain clamping assemblies comprises a chain wheel set, chains, clamping blocks mounted on the chain, and a pushing plate for pressing the clamping blocks. Further, clamping surfaces of the clamping blocks have a certain curvature with respect to guiding direction.

Guiding and injecting integrated mechanism for continuous conduit

A coring device has core drilling tool, a core catcher, a rock core barrel, a drilling machine outer cylinder, a flap valve and an inner rod for pulling the rock core barrel. The core catcher is provided inside the lower end of the rock core barrel. The core drilling tool includes an outer core tube and a hollow drill bit. The upper end of the outer core tube is connected to the lower end of the drilling machine outer cylinder. The lower end of the outer core tube is connected to the drill bit. The lower end of the inner rod protrudes into the rock core barrel and is movable axially by a certain distance relative to the rock core barrel. The flap valve includes a valve seat and a sealing flap. The valve seat is coaxially mounted on the inner wall of the drilling machine outer cylinder.

Coring device

A drilling control mechanism of a core drilling rig has a tooth drill and a core drilling rig. The core drilling rig is inside the tooth drill and engages with the drill in a sliding manner. A locking recess is formed at an inner wall of the tooth drill. A locking latch recess is formed at an outer wall of the core drilling rig and has a locking latch therein. The locking latch has a spring. When the locking recess is directly opposite the locking latch recess, the spring extends and the locking latch partially enters the locking recess. The core drilling rig has a central rod, a fluid channel activation module, an outer barrel, and outer barrel unlocking module and a flow diverging module. The central rod passes through the inner cavities of the fluid channel activation module, the outer barrel unlocking module and the flow diverging module.

Drilling control mechanism of core drilling rig

A drilling mechanism of a coring drilling rig has a central rod, a fluid channel starting module, an outer barrel, an outer barrel unlocking module, a flow diverging module and a drill bit. The central rod penetrates the fluid channel starting module. The outer barrel unlocking module and an inner cavity of the flow diverging module from back to front. The fluid channel starting module is behind the outer barrel and is connected to the outer barrel unlocking module. The flow diverging module is in front of the outer barrel unlocking module, and a hydraulic motor is connected in front of the flow diverging module. The outer barrel has a driving section that is a rotor of the hydraulic motor. The outer wall of the outer barrel is fixedly connected to a centralizer, and the front end of the outer barrel is connected to the drill bit.

Drilling mechanism of coring drilling rig

A fidelity retaining type coring device for a rock sample, comprising a rock core drilling tool, a rock core sample storage barrel, and a rock core sample fidelity retaining cabin. The rock core drilling tool comprises a coring drilling tool, a core catcher (), and an inner core pipe (); the coring drilling tool comprises an outer core pipe () and a hollow drill bit (), and the drill bit () is connected to the lower end of the outer core pipe (); the lower end of the inner core pipe () extends to the bottom of the outer core pipe (), and the inner core pipe () is in clearance fit with the outer core pipe (); the rock core sample fidelity retaining cabin comprises an inner coring barrel (), an outer coring barrel (), and an energy accumulator (); the outer coring barrel () is sleeved on the inner coring barrel (); the upper end of the inner coring barrel () is communicated with a liquid nitrogen storage tank (), and the liquid nitrogen storage tank () is located in the outer coring barrel (); the energy accumulator () is communicated with the outer coring barrel (); the outer coring barrel () is provided with a flap valve (). According to the device, a rock core can maintain its state in an in-situ environment; in addition, the drilling speed can be increased, and the coring efficiency can be improved.

Fidelity retaining type coring device for rock sample

A control mechanism of a core drilling rig includes a central rod () and an outer barrel (). The central rod () passes through, from the rear to the front, the inner cavities of a fluid channel activation module, an outer barrel unlocking module, a flow diverging module, and a coring barrel connecting module. The coring barrel connecting module comprises a core tube connecting pipe (), a core ring bearing (), a bearing inner ring (), a ball A () and a ball B (). The core tube connecting pipe () is connected at the front side thereof to the coring barrel (). The bearing inner ring () is inside the core tube connecting pipe (). The core ring bearing () is connected to an inner wall of the outer barrel ().

Control mechanism of core drilling rig

A coring drill tool driving structure has a driving motor (), an outer cylinder () and a coring drill tool (). The driving motor comprises an outer rotor () and an inner stator (), the inner wall of the outer rotor and the outer wall of the inner stator are provided with ribs () mutually matched, the outer rotor and inner stator are in clearance fit, the clearance between the outer rotor and the inner stator is a driving liquid flow path (), the outer rotor length is smaller than the inner stator length, the outer rotor is located between front and rear ends of the inner stator, the outer rotor is connected to the outer cylinder, a front end of the outer cylinder is connected to the coring drill tool, and a rear end of the inner stator is connected to a coupling ().

Coring drill tool driving structure

A core barrel sealing structure includes a core barrel, a drilling machine outer barrel, a chain mail-type flap valve and a trigger mechanism. The flap valve includes a valve seat and a chain mail-type valve flap. The trigger mechanism includes a trigger inner barrel and a trigger block. The trigger block is arranged in a through hole in a sidewall of the trigger inner barrel, and an inner wall of the drilling machine outer barrel is provided with a recessed opening adapted to the trigger block. When the core barrel is located in the valve seat, the valve flap is opened by 90&#xb0; and is located between the trigger inner barrel and the drilling machine outer barrel. When the core barrel is lifted upwards, the valve flap returns to a top face of the valve seat to make sealing contact with a sealing face of a valve opening.

Core barrel sealing structure capable of increasing sealing-specific pressure

The present invention provides a method of preparing an MOF-coated monocrystal ternary positive electrode material. Firstly, a solution A of nickel, cobalt and manganese metal salts, an ammonia complexing agent solution and a caustic soda liquid are added to a reactor for reaction to obtain a precursor core; then, an organic carboxylate is dissolved in an amount of an organic solvent to obtain a solution B; the solution B and a manganese metal salt solution with a given concentration are added to the reactor and aged to obtain an MOF-coated core-shell structure precursor; the core-shell structure precursor is pre-sintered at a low temperature to obtain a nickel-cobalt-manganese oxide with monocrystal structure; the nickel-cobalt-manganese oxide with monocrystal structure is uniformly mixed with LiOH&#xb7;HO in a mortar and then calcined at a high temperature to obtain an MOF-coated monocrystal ternary positive electrode material.

Growing community of inventors

Sichuan, China

Cong Li