STEM与日常科技·英语30篇（6）

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可充电电池为何随时间推移逐渐失容

Every time you charge and discharge a lithium-ion battery, microscopic changes occur inside its electrodes and electrolyte.
During charging, lithium ions move from cathode to anode, embedding themselves into graphite layers—a process called intercalation.
Repeated cycling causes some ions to get trapped or react with electrolyte, forming a solid-electrolyte interphase (SEI) layer.
While a thin SEI protects the anode, thickening over time blocks ion pathways and raises internal resistance.
Heat speeds up these side reactions, which is why storing batteries at 50% charge in cool places extends lifespan.
Cathode materials also degrade: nickel-rich types offer high energy density but suffer faster structural fatigue.
Manufacturers now use silicon blends in anodes to absorb more lithium—but swelling remains a key engineering challenge.
Smart chargers limit voltage peaks and avoid full 100% charges unless needed, reducing stress on aging cells.
Battery management systems track cycle count, voltage decay, and temperature history to estimate remaining health.
Understanding this wear helps engineers design longer-lasting batteries for phones, EVs, and grid storage alike.

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Cathode materials also degrade: nickel-rich types offer high energy density but suffer faster structural fatigue. 正极材料也会退化：高镍材料能量密度高，但结构疲劳更快。
Battery management systems track cycle count, voltage decay, and temperature history to estimate remaining health. 电池管理系统通过追踪循环次数、电压衰减及温度历史来估算剩余健康状态。
Understanding this wear helps engineers design longer-lasting batteries for phones, EVs, and grid storage alike. 理解此类老化机制，有助于工程师为手机、电动汽车及电网储能设计更耐用的电池。

这篇中文题目最接近哪一句？可充电电池为何随时间推移逐渐失容一次学校运动会的通知一份超市购物清单

课文第一句的意思更接近？每次给锂离子电池充放电，其电极和电解质内部都会发生微观变化。今天学校放假了。请把窗户打开。

这一课主要在讲什么？（看英文标题） Why Rechargeable Batteries Lose Capacity Over Time How to cook noodles A maths worksheet

Cathode materials also degrade: nickel-rich types offer high energy density but suffer faster structural fatigue.

Cathode materials also degrade: nickel-rich types offer high energy density but suffer faster structural fatigue.

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用今天的表达，自己说一句。

例子：Cathode materials also degrade: nickel-rich types offer high energy density but suffer faster structural fatigue.