Sodium-ion batteries in EV Technology - Mini Project: Build & Apply

Understanding Sodium-ion Batteries

📖 Scenario: You are learning about new battery technologies used in electric vehicles and portable devices. Sodium-ion batteries are an emerging alternative to lithium-ion batteries. Understanding their components and how they work helps you appreciate advances in energy storage.

🎯 Goal: Build a simple structured overview of sodium-ion batteries by creating data about their components, setting a key property, listing main advantages, and summarizing their potential uses.

📋 What You'll Learn

Create a dictionary named sodium_ion_battery with exact keys and values for components

Add a variable energy_density with the exact value representing Wh/kg

Use a list comprehension to create a list advantages filtering advantages containing the word 'cost'

Add a final summary string summary describing sodium-ion battery benefits

💡 Why This Matters

🌍 Real World

Sodium-ion batteries are researched as affordable and sustainable energy storage options for electric vehicles and grid storage.

💼 Career

Understanding battery components and properties is important for roles in renewable energy, electric vehicle design, and materials science.

1

Create the battery components dictionary

Create a dictionary called sodium_ion_battery with these exact key-value pairs: 'anode': 'hard carbon', 'cathode': 'sodium layered oxide', 'electrolyte': 'sodium salt in organic solvent'.

EV Technology

# Create the sodium_ion_battery dictionary with specified components
# Your code here

Need a hint?

Use curly braces {} to create a dictionary with the exact keys and values.

2

Add energy density variable

Add a variable called energy_density and set it to the exact number 150 representing watt-hours per kilogram (Wh/kg) for sodium-ion batteries.

EV Technology

sodium_ion_battery = {
    'anode': 'hard carbon',
    'cathode': 'sodium layered oxide',
    'electrolyte': 'sodium salt in organic solvent'
}
# Define energy_density as 150 Wh/kg
# Your code here

Need a hint?

Simply assign the number 150 to the variable energy_density.

3

Filter advantages containing 'cost'

Given the list all_advantages = ['low cost', 'abundant materials', 'good safety', 'fast charging', 'lower energy density'], create a list called advantages using a list comprehension that includes only the advantages containing the word 'cost'.

EV Technology

sodium_ion_battery = {
    'anode': 'hard carbon',
    'cathode': 'sodium layered oxide',
    'electrolyte': 'sodium salt in organic solvent'
}
energy_density = 150
all_advantages = ['low cost', 'abundant materials', 'good safety', 'fast charging', 'lower energy density']
# Create advantages list with items containing 'cost'
# Your code here

Need a hint?

Use a list comprehension to check if the substring 'cost' is in each advantage string.

4

Add summary description

Add a string variable called summary with this exact text: 'Sodium-ion batteries offer a low-cost, safe alternative with abundant materials but have lower energy density than lithium-ion.'

EV Technology

sodium_ion_battery = {
    'anode': 'hard carbon',
    'cathode': 'sodium layered oxide',
    'electrolyte': 'sodium salt in organic solvent'
}
energy_density = 150
all_advantages = ['low cost', 'abundant materials', 'good safety', 'fast charging', 'lower energy density']
advantages = [adv for adv in all_advantages if 'cost' in adv]
# Add the summary string variable
# Your code here

Need a hint?

Assign the exact summary text to the variable summary.