lithium ion battery pack Lithium titanate hydrates with superfast and stable cycling in lithium ion batteries

Titanium lithium and titanium dioxide are the two best. known high-
Performance electrodes capable of circulating about 10,000 times in a non-Proton lithium ion electrolyte.
Here, we show more lithium silicate water compounds with ultra-high speed and stable circulation.
That is to say, water promotes the structural diversity and nano-structure of the compounds, but does not necessarily reduce the electrical cycle stability or performance in the non-Proton electrolyte.
As the anode of lithium ion batteries, we have many
Phase titanium lithium water compound in ~ 35 °c (~ Full charging within 100 s) shows a specific capacity of about 30 mama-h-1 and lasts more than 10,000 cycles,001% per cycle.
In-situ diffraction of synchronous accelerator reveals no 2-
Phase change, but single solid-
Solution behavior during battery cycle.
Therefore, lithium hydroxide hydrate is not only a nano-structural intermediate to be roasted, but an ideal final destination. Fast-
Recently, charging electronic equipment has experienced great development.
Compounds on the binary LiO-TiO composition line, such as LiTiO (2LiO5TiO, LTO) and various TiO multiform (TO), are generally considered Li-
From the point of view of the rate capability and cycle stability and the improvement of the safety of graphite anode, ion battery.
Water is usually required to produce nano-structured materials on the LiO-TiO composition line
For example, hot water or sol-
Gel method, so one usually deals with reaction intermediates containing water (titanium lithium hydrate, LTHs) in LiO-TiO-HO ternary composition space (Fig. ).
Because water is considered "harmful"
The voltage window is a non-Proton electrolyte (free water can react to LiPF, lithium metal anode and lithium carbonate height), and most researchers heat the nano-structure LTHs, completely remove all water by raising the temperature to more than 500 °c.
However, this may lead to unnecessary side effects from the thickening and aggregation of the structure.
Here, we prove high.
Temperature pre-burn may not be required.
One may only need to remove more loose bound water (such as adsorption water and crystal water) by heating to a lower temperature below 260 °c, which does not result in a significant thickening of the nano-structure.
Water Deeply captured in LTHs, or fake water Stone (I. e.
, Hydroxide or oxygen onium ions or as-OH and-H bases), even if the HO: TiO molar ratio is as high as 0, it does not necessarily reduce the stability or performance of the non-Proton electrolyte. 41.
In fact, the captured water can promote structural diversity and nano-structure, which is very beneficial for battery performance in non-Proton electrolyte.
In this paper, a series of new materials in the LiO-TiO-HO ternary composition space were discovered by an optimized dehydration-induced nano-structure (ODIN) method, as shown in the figure
Attached animation (supplementary film ).
They exhibit better electrolytic properties compared to all lio-tio materials reported so far (see comparison in the supplementary table), including nano-structure, doping and/or post-coating properties.
As the anode of lithium ion batteries, our new titanium lithium water compound is ~ 35 °c (in ~ The specific capacity of about 30 µma can still be displayed and maintained for more than 100 cycles under full charge in 10,000 µs, and the capacity attenuation is only 0. 001% per cycle.
This finding indicates that either the water-heat or sol-
Gel synthesis should be carefully optimized as the phase transition driven by dehydration may be a valuable tool to create composites with nano-structural refinement, mixed battery and false capacitance features, however, the structure can be rough by further heating full dehydration, which actually reduces the electrochemical performance.