What is Lithium-ion battery?
Historical Background
Key Points
12 points- 1.
The core function of a Lithium-ion battery involves the movement of lithium ions between two electrodes – a positive electrode (cathode) and a negative electrode (anode) – through an electrolyte (a chemical medium that allows ions to flow) during charging and discharging.
- 2.
These batteries are composed of four main parts: a cathode (positive electrode), an anode (negative electrode), a separator (a porous film that prevents the electrodes from touching), and an electrolyte.
- 3.
They offer high energy density, meaning they can store a significant amount of electrical energy in a relatively small and light package. This characteristic is crucial for extending the range of electric vehicles (EVs) and making portable electronic devices practical.
- 4.
Lithium-ion batteries are rechargeable, allowing them to be charged and discharged hundreds or even thousands of times. This makes them a sustainable and cost-effective power source for long-term use in various applications, from mobile phones to electric buses.
Visual Insights
लिथियम-आयन बैटरी: कार्यप्रणाली, महत्व और चुनौतियाँ
यह माइंड मैप लिथियम-आयन बैटरी की कार्यप्रणाली, इसके प्रमुख लाभों, इलेक्ट्रिक वाहनों में इसकी भूमिका और संबंधित चुनौतियों को दर्शाता है।
Lithium-ion battery
- ●कार्यप्रणाली
- ●फायदे
- ●चुनौतियाँ
- ●EVs में भूमिका और भविष्य
लिथियम-आयन बैटरी: प्रमुख आंकड़े और लक्ष्य
यह डैशबोर्ड लिथियम-आयन बैटरी से संबंधित कुछ महत्वपूर्ण संख्यात्मक डेटा प्रस्तुत करता है, जो इसके आर्थिक महत्व और भविष्य के लक्ष्यों को दर्शाता है।
- पिछले दशक में लागत में कमी
- >80%
- ACC बैटरी विनिर्माण के लिए PLI योजना का लक्ष्य वर्ष
- 2025-26
लिथियम-आयन बैटरी की लागत में यह भारी कमी इलेक्ट्रिक वाहनों को पारंपरिक वाहनों की तुलना में अधिक किफायती बनाने में महत्वपूर्ण रही है।
यह लक्ष्य भारत में इलेक्ट्रिक वाहनों और नवीकरणीय ऊर्जा भंडारण के लिए महत्वपूर्ण घटकों के घरेलू विनिर्माण को बढ़ावा देने के लिए है।
Recent Real-World Examples
1 examplesIllustrated in 1 real-world examples from Mar 2026 to Mar 2026
Source Topic
Government Aims for All-Electric 'Bharat Taxis' Within Three Years
EconomyUPSC Relevance
Frequently Asked Questions
121. UPSC often tests the advantages of Lithium-ion batteries. What is the most common misconception or 'trap' related to their "memory effect" that aspirants should be aware of?
The most common trap is assuming Lithium-ion batteries suffer from the 'memory effect'. Unlike older battery chemistries like Nickel-Cadmium (Ni-Cd), Lithium-ion batteries DO NOT suffer from the memory effect. This means they can be recharged at any point without losing their maximum energy capacity, which is a significant advantage.
Exam Tip
Remember: Li-ion batteries are 'memory-free'. If a statement says they suffer from memory effect, it's likely incorrect. This is a classic Prelims trap.
2. In a statement-based MCQ, how would one distinguish between the 'cathode' and 'anode' in a Lithium-ion battery, and what crucial role does the 'separator' play?
In a Lithium-ion battery, the cathode is the positive electrode and the anode is the negative electrode. During discharge, lithium ions move from the anode to the cathode, and during charging, they move from the cathode back to the anode. The separator is a porous film placed between the cathode and anode that prevents them from physically touching, thereby preventing a short circuit, while still allowing lithium ions to pass through the electrolyte.
