JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV NANOTECHNOLOGY FOR ENERGY SYSTEMS Previous Question Paper (July - 2019 - R15)
Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
Part A
Explain Ion flow in Lithium ion based Battery.
Answer
During discharge, lithium ions move from the negative electrode (anode) through the electrolyte and separator to the positive electrode (cathode), while electrons flow through the external circuit to power the device. During charging, this process is reversed, with ions migrating back to the anode.
Explain the Limitations of Lithium ion based Battery
Answer
Limitations include: 1) Thermal instability leading to safety risks like overheating or fire. 2) Capacity fade over repeated charge-discharge cycles due to electrolyte decomposition and electrode degradation. 3) High manufacturing costs and sensitivity to overcharging or deep discharging.
What is energy and how is it calculated?
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What is the difference between Renewable and Non-renewable energy?
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What is the difference between using Quantum dots and Quantum wells in a Solar cell?
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Give two Differences between CIGS and CDTE Solar cells.
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Mention in detail about Hydrogen Storage based Automotive Applications.
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Give a note on Hydrogen purification.
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Explain the working Principles of solid oxide and direct methanol Fuel cells.
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Explain the Applications of Phosphoric acid Fuel cell.
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Part B
Explain the wide Applications of Lithium ion based Batteries.
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Explain the Different types of Lithium ion based Batteries.
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Explain Capacitance, Charge Storage Capacity, Energy density, Power Density in Lithium ion Battery.
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Explain the working Principle, Production, Advantages and Disadvantages Lithium ion based Battery.
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Briefly Discuss about nanomaterials and nanostructures in Energy Harvesting.
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What are the Implementations in Renewable energy Technologies using Nanotechnology?
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What are the Challenges, and Developments through nanomaterials and nanostructures in Energy Harvesting?
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Discuss about Renewable energy Technology Across the Board.
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What is solar energy Harvesting? How are Photo thermal cells used in solar energy Harvesting?
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Discuss about Thin film solar cells, their working, Production and Applications.
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What are CIGS Solar cells? Explain their Disadvantages?
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What are dye-sensitized Solar cells? Write about their Advantages?
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Explain the hydriding and dehydriding kinetics of Hydrogen reactions.
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How is Hydrogen stored in metal hydrides and metal-organic framework materials?
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Explain high enthalphy formations and thermal management during hydriding reaction?
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Explain different Hydrogen storage methods and Hydrogen Production methods.
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Explain briefly Principle and Operation of PEM Fuel cell.
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What are the various Applications of Fuel cells?
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What are the Principles, Advantages and Disadvantages of Fuel cells?
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What are the Different types of Fuel cells?
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