In Situ Atomic-Scale Observation of Electrochemical Delithiation Induced Structure Evolution of LiCoO2 Cathode in a Working All-Solid-State Battery

2017 ◽  
Vol 139 (12) ◽  
pp. 4274-4277 ◽  
Author(s):  
Yue Gong ◽  
Jienan Zhang ◽  
Liwei Jiang ◽  
Jin-An Shi ◽  
Qinghua Zhang ◽  
...  
Keyword(s):  
Solid State ◽  
Atomic Scale ◽  
Structure Evolution ◽  
Solid State Battery ◽  
Induced Structure ◽  
Licoo2 Cathode

scholarly journals Time-resolved in situ neutron diffraction studies of Li-ion battery materials

2014 ◽  
Vol 70 (a1) ◽  
pp. C353-C353 ◽  
Author(s):  
Neeraj Sharma
Keyword(s):  
Crystal Structure ◽  
Neutron Diffraction ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Electrochemical Process ◽  
Atomic Scale ◽  
Structure Evolution ◽  
Time Resolved ◽  
In Situ Neutron Diffraction

Lithium-ion batteries are ubiquitous in society, used in everything from children's toys to mobile electronic devices, providing portable power solutions. There is a continuous drive for the improvement of these batteries to meet the demands of higher power devices and uses. A large proportion of the function of lithium-ion batteries arises from the electrodes, and these are in turn mediated by the atomic-scale perturbations or changes in the crystal structure during an electrochemical process (e.g. battery use). Therefore, a method to both understand battery function and propose ideas to improve their performance is to probe the electrode crystal structure evolution in situ while an electrochemical process is occurring inside a battery. Our work has utilized the benefits of in situ neutron diffraction (e.g. sensitivity towards lithium) to literally track the time-resolved evolution of lithium in electrode materials used in lithium-ion batteries (see Figure 1). With this knowledge we have been able to directly relate electrochemical properties such as capacity and differences in charge/discharge behaviour of a battery to the content and distribution of lithium in the electrode crystal structure. This talk will showcase some of our in situ investigations of materials in lithium-ion batteries, such as LiCoO2, LiFePO4, Li1+yMn2O4, LiNi0.5Mn1.5O4 and Li4Ti5O12/TiO2 electrodes. In addition, selected examples of our work using time-resolved in situ X-ray diffraction to probe other batteries types, such as primary lithium and secondary (rechargeable) sodium-ion batteries will be presented. Using time-resolved diffraction data, a comprehensive atomic-scale picture of battery functionality can be modelled and permutations can be made to the electrodes and electrochemical conditions to optimize battery performance. Therefore, crystallography and electrochemistry can mesh together to solve our energy needs.

scholarly journals In situ synchrotron powder diffraction for an ionic conductor transition

2014 ◽  
Vol 70 (a1) ◽  
pp. C1181-C1181
Author(s):  
Hidetaka Kasai ◽  
Kenichi Kato ◽  
Akihiro Hori ◽  
Masaki Takata ◽  
Susumu Kitagawa ◽  
...  
Keyword(s):  
Chemical Reaction ◽  
Powder Diffraction ◽  
Layer Structure ◽  
Electronic Conductivity ◽  
Ionic Conductor ◽  
Atomic Scale ◽  
Structure Evolution ◽  
Triple Layer ◽  
Synchrotron Powder Diffraction

In situ synchrotron X-ray powder diffraction can be one of the most powerful probes to investigate the structure evolution by a chemical reaction thanks to simultaneity of data collection. It is not, however, with ease to produce a homogeneous chemical reaction in the limited spaces, which is essential to see an atomic-scale structure evolution. We have developed an in situ capillary cell for both high-temperature H2reduction and precise humidity control at the SPring-8 BL44B2. We successfully applied this in situ system to an electronic conductor LaSr3Fe3O10, which is transformed into an ionic conductor by the two-step chemical treatments [1]. LaSr3Fe3O10has a triple-layer structure with a FeO6octahedral unit. One triple layer is bonded with another layer through van der Waals interaction. Structure refinements with in situ synchrotron powder diffraction data revealed that the H2reduction at 613 K produced in-plane oxygen vacancies, which resulted in suppression of the interlayer interaction. We found from charge density studies and Raman spectroscopy measurements that the following humidification intercalated H2O and OH-into the interlayer and intralayer, respectively. That means that H2O plays a role for suppression of three-dimensional electronic conductivity, stabilizing the intercalation structure. On the other hand, the OH-ions behave as carriers for ionic conductivity, maintaining the charge neutrality in the intralayer. Finally we determined the composition of the ionic conductor to be LaSr3Fe3O8.0(OH)1.2·2H2O, which indicates a transformation of LaSr3Fe3O10into an OH-ionic conductor. In the presentation, I will discuss the OH-ionic conduction channel based on electrostatic potentials obtained from charge densities.

scholarly journals Multi-scale Imaging of Solid-State Battery Interfaces: From Atomic Scale to Macroscopic Scale

Chem ◽  
2020 ◽  
Vol 6 (9) ◽  
pp. 2199-2218 ◽  
Author(s):  
Shuaifeng Lou ◽  
Zhenjiang Yu ◽  
Qingsong Liu ◽  
Han Wang ◽  
Ming Chen ◽  
...  
Keyword(s):  
Solid State ◽  
Atomic Scale ◽  
Macroscopic Scale ◽  
Multi Scale ◽  
Solid State Battery

Atomic-Scale In-situ Observation of Carbon Nanotube Growth from Solid State Iron Carbide Nanoparticles

Nano Letters ◽  
2008 ◽  
Vol 8 (7) ◽  
pp. 2082-2086 ◽  
Author(s):  
Hideto Yoshida ◽  
Seiji Takeda ◽  
Tetsuya Uchiyama ◽  
Hideo Kohno ◽  
Yoshikazu Homma
Keyword(s):  
Carbon Nanotube ◽  
Solid State ◽  
Iron Carbide ◽  
Atomic Scale ◽  
In Situ Observation ◽  
Carbon Nanotube Growth ◽  
Nanotube Growth
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