Nanomaterial Improves Safety of Lithium Metal Batteries: nanomaterial lithium batteries nanotubes lithiumbattery nanoenergy Chem_Eng_J
By Bhavna KavetiAug 11 2022Reviewed by Susha Cheriyedath, M.Sc. Among high-capacity anodes, lithium metal anodes are perfect candidates for the design of rechargeable batteries due to their extremely high theoretical specific capacity, the lowest negative potential, and low gravimetric density.
Compared to Celgard and control OPVA separators, the fabricated OPVA/NHNTs separator showed high ion conductivity and Young's modulus, retarding the growth of lithium dendrites, and maintaining the electrochemical properties in lithium metal batteries. Strategies to Achieve Lithium Metal Batteries with High Safety Lithium-ion batteries could not meet the growing demand for energy density for specific applications in electric vehicles and large-scale energy storage systems. Hence these LIBs were replaced by lithium metal batteries having high energy density by replacing graphite with lithium metal as anode.
To enhance the safety of lithium metal batteries, strategies such as the employment of advanced separators and maintaining stable anion mobility in the battery systems were proposed for the suppression of lithium dendrite growth. Many reported works to date were designed based on employing electrolyte additives, modified polymer separators , synthetic electrolytes, and hierarchical current collectors.
The separator based on natural inorganic nanotube-based nano architectures of the present work revealed the criticality of ion conductivity and elasticity on lithium dendrite growth inhibition. Furthermore, the PVA polymer matrix used in this work was nontoxic to human health as well as environmentally friendly.
The results revealed that ion conductivity and elastic strength are critical parameters in realizing dendrite-free lithium metal batteries. Consecutively, the polymer-based Celgard and OPVA separators with poor ion conductivity and Young’s modulus or separators with low ion conductivity and high Young’s modulus could not prevent the penetration of lithium dendrites through the separator in these batteries.
Australia Latest News, Australia Headlines
Similar News:You can also read news stories similar to this one that we have collected from other news sources.
Supermarket food could soon carry eco-labels, says studyScientists hope that a scoring system will lead manufacturers to compete over sustainability.
Read more »
Women on vegetarian diets more likely to break their hips, study findsResearchers found female vegetarians see their risk of hip fracture increase by 33% compared to those who eat meat. They said a possible reason for this could be vegetarian diets 'often have lower intakes of nutrients that are linked with bone and muscle health'.
Read more »
Vegetarian women more likely to break hips - studyWomen who do not eat meat are more likely to break their hips in later life, a study has claimed.
Read more »
Patterns of Healthcare Utilization and Spending Among Homebound Older Adults in the USA: an Observational Study - Journal of General Internal MedicineBackground Homebound older adults have complex social, medical, and financial needs, but little is known about their healthcare utilization and spending. Objective To characterize healthcare utilization and spending among homebound older adults. Design Cohort study using National Health and Aging Trends Study data linked to Medicare Fee-for-Service (FFS) claims data. Participants Adults aged 70 years and older with Medicare FFS coverage (n=6468). Main Measures In a person-year analysis, survey-weighted rates and adjusted marginal differences in inpatient, outpatient, and emergency department utilization and spending 12 months post-interview were calculated by homebound status, defined as reporting never or rarely (no more than 1 day/week) leaving home in the last month. Key Results Compared to the non-homebound, homebound observations had lower annual unadjusted rates of accessing primary care (60.9% vs 71.9%, p | 0.001) and specialist care (61.0% vs 74.9%, p | 0.001) and higher annual rates of emergency department use (54.0% vs 32.6%, p | 0.001) and hospitalization (39.8% vs 19.8%, p | 0.001). Total annual Medicare spending was $11,346 higher among the homebound compared to the non-homebound (p | 0.001). In a single year analysis (2015), homebound older adults accounted for 11.0% of Medicare spending among those over 70 despite making up only 5.7% of this population. 13.6% of the homebound were in the 95th percentile or above of Medicare spending in 2015. In models adjusting for demographic, clinical, and geographic characteristics, homebound status was associated with a decreased likelihood of having an annual primary care or specialist visit and $2226 additional total annual Medicare spending. Conclusions Homebound older adults use more hospital-based care and less outpatient care than the non-homebound, contributing to higher levels of overall Medicare spending.
Read more »
Diagnostic Yield of Combined Cardiomyopathy and Arrhythmia Genetic TestingThis cohort study assesses the diagnostic yield and clinical management implications of combined cardiomyopathy and arrhythmia genetic testing among patients with a suspected genetic cardiomyopathy or arrhythmia.
Read more »