a high-power and fast charging li-ion battery with outstanding cycle-life - lithium ion cell

Technology equipment based on lithium energy storage
Currently, ion batteries power almost all electronic devices and power tools.
The development of new Li --
By integrating innovative functional components, Ion battery configuration (
Electrode Material and electrolyte formula)
It will allow the technology to go beyond mobile electronics and improve performance to a large extent, beyond countries-of-the-art.
Here we show a new complete Li-
The lithium ion battery is made by one
Potential cathode materiale. LiNi0. 5Mn1.
A safe nano-structured anode material. e.
A composite electrolyte made of an ionic liquid mixture suitable for high potential applications, I . E. e.
Lithium salt Pyr1, 4PF6, I. e.
LiPF6 and standard organic carbonates.
The final battery configuration enables the reversible cycle of lithium thousands of times at 1000mag-1, with a capacity of 65% in 2000 cycles.
Energy conversion and storage is the key enabling technology, which will be a large-scale electricity in the 21 st century. Smart Mobile
Continental grid-
Scale and actual reduction of CO emissions.
Technology equipment based on lithium energy storage
Currently, ion batteries power almost all electronic devices.
Progress in Li's breakthroughion batteries (LIBs)
The development of anode, cathode and electrolyte materials by relying on innovative chemical technology can achieve higher power performance, longer cycle life, higher safety and sustainability.
Here we present and present a new formula for all-lithium ion batteries. The key-
Innovation is a unique combination (a)
Nano-structured TiO-
Negative electrode based on custom 1-1
Tubular form; (b)a LiNiMnO-
Base positive pole (LNMO)
Chemical metrology with fine tuning and through single-
Stage, simple, cheap, simple-
Scalable mechanical chemical grinding route for high temperature annealing in airand (c)
A kind of methanol carbonate and N-by LiPF, ethylene carbonate-n-butyl-N-
Methylpyrrocium fluoride phosphate (PyPF)
The composition of the optimized ionic liquid.
This complete battery configuration is capable of providing superior performance in terms of power density and cycle life, with higher safety compared to commercial batteries provided by ionic liquid components, and because there is no cobalt in the cathode material, the cost is lower and the environmental compatibility is improved.
In the current literature, a large number of possible alternative configurations for next-generation lithium
According to various chemicals on both sides of cathode and anode and electrolyte, ion batteries are proposed.
Among them, a concept of 3-3. 5u2009V Li-
Preparation of ion batteries by LNMO spinel coupled with TiO-
The base anode is shown. Titanium oxide-
Compared with graphite and conversion/alloy materials, the base anode has relevant advantages :(a)
The working potential is within the thermodynamic stability window of the standard organic carbonated electrolyte (>0. 8u2009V vs. Li); (b)titanium oxide-
Nano can be easily obtained from base materials
Excellent power performance is obtained by adjusting the synthesis conditions;
Their density is twice that of graphite, so the volume performance can be doubled compared to standard graphitebased Li-ion cells.
Unfortunately, their high operational potential (1. 5u2009V vs Li)
It is also an important shortcoming of the energy density of the whole battery.
So they need
Potential cathode, e. g.
LNMO, or others like LiCoPO, have achieved competitive results in the countryof-the-
Art formula.
When it comes to the cathode side, the high-pressure LNMO spinel oxide, due to its large reversible capacity and high thermal stability, is one of the most promising cathode materials, the low cost and zero content of toxic, high cost and pollutant cobalt. The key-
The key to obtaining excellent power performance from this material is to optimize the synthesis procedure for good performance
The particles with optimal morphology are formed.
However, through a simple and single
A step-by-step synthesis strategy to optimize the crystalline, composition, morphology and surface properties, able to fully address the severe capacity fading of the LNMO cathode, especially at high speeds and high temperatures, has never been reported
In fact, only through complex and expensive multi-doping will the appropriate lattice doping be combined with the coating
The stage synthesis program is obviously able to obtain Superior Performance Materials in lithium batteries.
The main reason for the capacity attenuation of the LNMO electrode at the circulating root is the complex parasitic chemistry that occurs on the positive electrode surface at high potential.
In fact, any high potential cathode material, combined with commercial carbon carbonate-
Based on the electrolyte, resulting in a large increase in parasitic reactivity when the cycle exceeds 4. 2–4. 5u2009V vs Li.
This inevitable impact
Bike performance and self
Discharge, resulting in rapid battery failure.
Non-additives and uses
Carbonated co-
Solvent has been proposed in the literature, but so far there is no final solution for more than 4 stable liquid electrolyte. 2–4. 5u2009V vs.
Li has been found.
In order to solve the shortcomings under the above high potential and improve the safety of the battery, we have developed a composite solution by mixing Ionic Liquids (IL)
Component PyPF with traditional LiPF-
Carbonate-based electrolyte (i. e.
Selected business LP30™)
Obtain innovative electrolyte that can work at high potential and improve thermal stability.
LiPF salt has a series of unique properties due to its successful use in lithium battery electrolyte, including the ability to achieve high ion conductivity and negligible reactivity to aluminum current collectors.
Although LiPF is widely used, there are also some restrictions on the use of LiPF in combination with carbonated solvents.
The main problem is the potential safety hazard associated with the volatile carbonate
Safe and practical ion conduction assembly and limited temperature range.
It is proved that the hybridization of volatile carbonates with ionic liquid components is effective in reducing electrolyte ignition. The IL-
We have already introduced the LP30 composition selected in this work in the references.
We demonstrated :(i)
Inhibition of IL crystals and smoothing of the melting/crystalline features of LP30 components, the applicability of composite electrolyte decreases to-30 °c as the temperature decreases; (ii)
Impressive ionic conductivity, both at room temperature (≥10u2009Su2009cm)and at sub-zero (
> 10 sscm cm at-30 °c); (iii)
Compared with the bare LP30, the anode stability of the mixed electrolyte has been improved, with good
Controlled decomposition current density below 0. The month of 1ymma cuccm. 1u2009V vs Li.
It was also found that the flash point of this new composite electrolyte was increased by 10 °c relative to the commercial LP30 solution (i. e. 32 °C vs. 22 °C).
Therefore, this innovative electrolyte is coupled with the high potential positive electrode material, I . E. e.
A negative electrode material that is inherently safe. e.
TiO, allows the final cell configuration with essential chemical safety to be comparable to the safest carbonated rootbased Li-
Ion batteries on the markete.
Lithium iron phosphate/LiTiO (LFP-LTO)
One, but the average operating voltage is about 2.
7-3 u2009 V, much higher than 1. 9u2009V of the LFP-LTO cell.
Anyway, here-
The proposed all-lithium-ion battery formulation utilizes three simultaneous innovations on both electrode sides and electrolyte, disclosing excellent and unprecedented power performance and cycle life compared to the stateof-the-
Art, a parallel improvement of the device's intrinsic safety by using ionic liquid components and by replacing cobalt in cathode active materials.