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Hybrid lithium-ion battery-capacitor (h-libc) energy storage devices

a lithium-ion battery and energy storage device technology, applied in hybrid/edl manufacturing, capacitors, electrolytic capacitors, etc., can solve the problems of poor cycle life of 5,000 cycles, low specific power of 0.5 kwkgsup>1 /sup>

Inactive Publication Date: 2019-10-17
GENERAL CAPACITOR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a new type of energy storage device that combines the features of a lithium-ion battery and a lithium-ion capacitor. This device has a unique structure with a hybrid composite cathode electrode that includes a lithium metal oxide, activated carbon, and a binder. The anode electrode has a thin lithium film source pre-lithiated on its surface. The device also includes a separator and an organic solvent electrolytic solution. The capacity ratio of the hybrid composite cathode to the anode electrode can be calculated using a formula. The device has a high energy density and can be used in a variety of applications such as electric vehicles. The method for making the hybrid composite cathode involves mixing lithium metal oxide, activated carbon, and a binder as dry powders and pressing them to create a free-standing cathode film that is then laminated onto a current collector. The technical effects of this patent are a new type of energy storage device with a unique structure and high energy density.

Problems solved by technology

The LIB has a high specific energy of 100-250 Wh·kg−1; however, it has a low specific power of −1 and a poor cycle life of <5,000 cycles.

Method used

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  • Hybrid lithium-ion battery-capacitor (h-libc) energy storage devices
  • Hybrid lithium-ion battery-capacitor (h-libc) energy storage devices
  • Hybrid lithium-ion battery-capacitor (h-libc) energy storage devices

Examples

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example 1

[0062]Commercial active materials were used for the negative electrode (NE / anode) and positive electrode (PE / cathode) preparations. Four types of hybrid composite cathode PEs were prepared with various mass ratios of LFP:AC including 20:80 (20% LFP), 40:60 (40% LFP), 60:40 (60% LFP) and 80:20 (80% LFP) as shown in FIG. 2. Dry methods of electrode fabrication were used.

[0063]A pure AC reference electrode (LIC with 0% LFP) was prepared as a control group. A free-standing film was first prepared by mixing the above various mass ratios of LFP: AC (0% to 80% LFP), with 8 wt. % Polytetrafluoroethylene (PTFE, DuPont™) as a binder, based on the total hybrid composite cathode electrode active layer weight. LFP nanoparticles were received from the manufacturer pre-coated with a thin layer of carbon and were used as received. The carbon coating is known to have a beneficial effect on capacity and rate performance. This mixture was blended in a dry process by a high-speed blender until a homoge...

example 2

[0094]Another set of nine-layer H-LIBC laminate cells for test and evaluation were produced in the same manner as in EXAMPLE 1, except that the LIB cathode active material in the hybrid composite cathode electrode for H-LIBC was changed from Lithium Iron Phosphate (LiFePO4, LFP) to LiNi0.5Co0.2Mn0.3O2 (NMC) to produce the NMC / AC based nine-layer H-LIBC laminate cells of EXAMPLE 2. Table 6 below summarizes the NMC / AC based nine-layer LIC and H-LIBC laminate cell parameters and initial test C & ESR and other electrochemical performance results. It can be observed from Table 6 that the specific energy of laminate cells increases from 14 Wh / kg to 61 Wh / kg when the NMC % increases from 0% to 80%. However, the maximum specific power of the laminate cells decreases from 9 kW / kg to 3.0 kW / kg when the NMC% increases from 0% to 80%. Increased NMC added into the composite hybrid cathode will lead to higher specific energy and energy density because the specific capacity of NMC is about 3 times...

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Abstract

A hybrid lithium-ion battery-capacitor (H-LIBC) energy storage device includes a hybrid composite cathode electrode having a lithium ion battery (LIB) cathode active material and a lithium ion capacitor (LIC) cathode active material. An anode electrode having a surface is pre-loaded and pressed with a lithium (Li) thin film source. The anode electrode is pre-lithiated with the lithium film source by positioning the Li film source on the surface of anode electrode after electrolyte filling and soaking processes, A separator and an organic solvent electrolytic solution including a lithium salt electrolyte are also provided. A method of making a hybrid lithium-ion battery-capacitor and a method of making a hybrid composite cathode for a hybrid lithium-ion battery-capacitor are also disclosed.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to U.S. Provisional Application No. 62 / 658,082 filed on Apr. 16, 2018, entitled “HYBRID LITHIUM-ION BATTERY CAPACITOR (H-LIBC) ENERGY STORAGE DEVICES”, the entire disclosure of which incorporated herein by reference.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT[0002]This invention was made with government support under contract no. W911NF-15-2-0103 awarded by the U.S. Army Research Laboratory and contract no. N00014-17-1-2650 awarded by the Office of Naval Research. The government has certain rights in this invention.FIELD OF THE INVENTION[0003]The present invention is directed to energy storage devices, and more particularly to energy storage devices incorporating lithium.BACKGROUND OF THE INVENTION[0004]The lithium (Li)-ion battery (LIB) and electric double-layer capacitor (EDLC) are two widely used electrochemical energy storage devices. A typical LIB is made with a Li intercalated an...

Claims

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Application Information

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IPC IPC(8): H01G11/06H01G11/50H01G11/52H01G11/60H01G11/46H01G11/38H01G11/24H01G11/86H01G11/62
CPCH01G11/50H01G11/24H01G11/60H01G11/46H01G11/06H01G11/52H01G11/62H01G11/86H01G11/38
Inventor CAO, WANJUN BENYAN, JINCHEN, XUJIEZHENG, JIAN-PINGSHELLIKERI, ANNADANESHHAGEN, MARK ANDREW
Owner GENERAL CAPACITOR