Long-Term Cycling of a Mn-Rich High-Voltage Spinel Cathode by Stabilizing the Surface with a Small Dose of Iron

2021 ◽  
Author(s):  
Feng Zou ◽  
Zehao Cui ◽  
Himamshu C. Nallan ◽  
John G. Ekerdt ◽  
Arumugam Manthiram
Keyword(s):  
High Voltage ◽  
Small Dose ◽  
Spinel Cathode

561 Bilateral Upper Extremity Amputation After High Voltage Electrical Injury: A Case Report

2021 ◽  
Vol 42 (Supplement_1) ◽  
pp. S130-S131
Author(s):  
Andrew Khalifa ◽  
Anzar Sarfraz ◽  
Jacob B Avraham ◽  
Ronnie Archie ◽  
Matthew Kaminsky ◽  
...  
Keyword(s):  
Case Report ◽  
High Voltage ◽  
Troponin I ◽  
Low Voltage ◽  
Foley Catheter ◽  
The United States ◽  
Upper Extremities ◽  
Full Thickness ◽  
Electrical Injuries

Abstract Introduction Electrical injuries represent 0.4–3.2% of admissions to burn units and are responsible for >500 deaths per year in the United States. Approximately half occur in the workplace and are the fourth leading cause of work-related-traumatic death. The extent of injury can be drastically underestimated by total body surface area percentage (TBSA). Along with cutaneous burns, high voltage electrical injuries can lead to necrosis of muscle, bone, nervous tissue, and blood vessels. Aggressive management allows for patient survival, but at significant cost. Newer technologic advances help improve functional outcomes. Methods This case-report was conducted via retrospective chart review of the case presented. Results A 43-year-old male sustained a HVEI (>10, 000 V) after contacting an active wire while working as a linesman for an electric company. He presented after less than 15-minute transport from an outside hospital with full thickness burns and auto-amputation to all fingers on both hands and the distal third of the left hand (Images 1 and 2). There were full thickness circumferential burns to the entire left and right upper extremities with contractures, with the burns extending into the axilla, and chest wall musculature. The patient had 4th degree burns and a large wound to the left shoulder with posterior extension to the scapula, flank and back with approximately 25% TBSA (Image 3). Compartments were tense in both upper extremities. Patient was sedated and intubated to protect the airway and placed on mechanical ventilation. A femoral central line was then placed, and the patient was given pain control, continued fluid resuscitation, and blood products. Dark red colored urine from a foley catheter that was immediately identified as rhabdomyolysis induced myoglobinuria. Labs drawn demonstrated elevated troponin I, CK >40,000. BUN 18, creatinine 1.0, K+ 5.2 and phosphate 5.6. Decision was made immediately for operative intervention with emergent amputation of both upper extremities in the light of rhabdomyolysis secondary to tissue necrosis and oliguria. During the patient’s hospital course, he underwent multiple operations for further debridement with vacuum-assisted closure therapy and skin grafting of sites, as well as targeted muscle reinnervation (TMR) 6 months later at an outside hospital. Conclusions Although HVEI only account for a small percentage of burn admissions, they are associated with greater morbidity than low-voltage injuries. Patients with HVEI often incur multiple injuries, more surgical procedures, have higher rates of complications, and more long term psychological and rehabilitative difficulties. Despite the need for amputation in some of these critically ill patients, options exist that allow for them to obtain long term functional success.

scholarly journals Insight into the improved cycling stability of sphere-nanorod-like micro-nanostructured high voltage spinel cathode for lithium-ion batteries

Nano Energy ◽  
2019 ◽  
Vol 66 ◽  
pp. 104100 ◽  
Author(s):  
Haiping Liu ◽  
Gemeng Liang ◽  
Chao Gao ◽  
Sifu Bi ◽  
Qiang Chen ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
High Voltage ◽  
Lithium Ion ◽  
Cycling Stability ◽  
Spinel Cathode ◽  
Insight Into

scholarly journals Ageing Tests of Samples of Glass-Epoxy Core Rods in Composite Insulators Subjected to High Direct Current (DC) Voltage in a Thermal Chamber

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6724
Author(s):  
Krzysztof Wieczorek ◽  
Przemysław Ranachowski ◽  
Zbigniew Ranachowski ◽  
Piotr Papliński
Keyword(s):  
High Voltage ◽  
Direct Current ◽  
Ionic Current ◽  
Microscopic Analysis ◽  
Hardness Measurement ◽  
Bending Test ◽  
Long Term Effects ◽  
Thermal Chamber ◽  
Core Rod

In this article, we presented the results of the tests performed on three sets of samples of glass-reinforced epoxy (GRE) core rods used in alternating current (AC) composite insulators with silicone rubber housing. The objective of this examination was to test the aging resistance of the rod material when exposed to direct current (DC) high voltage. We hypothesized that the long-term effects of the electrostatic field on the GRE core rod material would lead to a gradual degradation of its mechanical properties caused by ionic current flow. Further, we hypothesized that reducing the mechanical strength of the GRE core rod would lead to the breakage of the insulator. The first group of samples was used for reference. The samples from the second group were subjected to a temperature of about 50 °C for 6000 h. The third group of samples were aged by temperature and DC high voltage for the same time. The samples were examined using the 3-point bending test, micro-hardness measurement and microscopic analysis. No recordable degradation effects were found. Long-term temperature impact and, above all, the combined action of temperature and DC high voltage did not reduce the mechanical parameters or change the microstructure of the GRE material.

857 Reconstruction of the Pediatric Upper Extremity Following High Voltage Electrical Burn Injury

2020 ◽  
Vol 41 (Supplement_1) ◽  
pp. S266-S267
Author(s):  
Matthew A Depamphilis ◽  
Ryan Cauley ◽  
Farzin Sadeq ◽  
Robert Sheridan ◽  
Daniel N Driscoll
Keyword(s):  
Upper Extremity ◽  
High Voltage ◽  
Pediatric Patients ◽  
Burn Injury ◽  
Multidisciplinary Treatment ◽  
Small Surface ◽  
Term Function ◽  
Electrical Burns ◽  
Electrical Injuries

Abstract Introduction High voltage electrical burns are often associated with significant morbidity, posing great acute and delayed reconstructive challenges for plastic surgeons. As survival from these injuries increases, attention has been focused on improving quality of life post burn injury through restoration of sensory and motor function. However, due to the complexity of the upper extremity and its small surface area in pediatric patients, its reconstruction can be a very complex endeavor. Especially in pediatric patients that are still growing, ensuing great risk for upper extremity contracture and deformity. Methods A retrospective chart review was conducted on patients aged 0–18 years admitted to our institution with a high voltage electrical burn involving the upper extremity. The timeframe under study was 13 years from January 1st 2005 to December 1st 2018. This project was undertaken at our institution as an exempt project under 45 CFR 46.101 and, as such, it was not formally supervised by an Institutional Review Board. Results Out of the 68 electrical burns treated at our pediatric burn center, 58 involved the upper extremity. This further divides into 37 patients with high voltage and 31 patients with low voltage upper extremity electric burns. Of the 37 high voltage upper extremity patients, 35 underwent acute surgical management and 18 had delayed surgical reconstruction for the upper extremity. Conclusions The reconstructive techniques employed at our institution following severe electrical injuries typically follow a reconstructive ladder. The majority of chronic contractures in our series were successfully treated with either minimally invasive techniques such as laser and steroid infiltration, local tissue flaps, or release and skin grafting. Applicability of Research to Practice Multidisciplinary treatment of severe electrical injuries to the upper extremity is vital to optimizing a patient’s long-term function. Given the significant depth of injury in cases of electrical burns to the upper extremity the risk of developing contractures is relatively high. The expeditious treatment of secondary contractures is important to maximize a patient’s long-term function. The general treatment of contractures of the upper extremity should be based on the location and severity of the contracture, with considerations made for the patient’s reconstructive goals.

Small dose of L-dopa/Benserazide hydrochloride improved sepsis-induced neuroinflammation and long-term cognitive dysfunction in sepsis mice

2020 ◽  
Vol 1737 ◽  
pp. 146780 ◽  
Author(s):  
Fan Li ◽  
Bin Zhang ◽  
Shangchun Duan ◽  
Wenxiang Qing ◽  
Longjiao Tan ◽  
...  
Keyword(s):  
Cognitive Dysfunction ◽  
Small Dose
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