| 5 | 1/1 | 返回列表 |
| 查看: 1427 | 回復: 6 | |||
| 當前只顯示滿足指定條件的回帖,點擊這里查看本話題的所有回帖 | |||
zhangj199305新蟲 (小有名氣)
|
[交流]
說capacity 會隨著current density 增大而降低? 已有6人參與
|
||
|
電化學初學者,有一問題向各位請教一下: 最近在一篇Goodenough文章中看到這么一個結(jié)論,說隨著current density的提高,電池的capacity會隨之下降。 按照文中解釋是說,當外電路的electronic current density 較小時,可以與電池內(nèi)部的ionic current density達到平衡,但是當ionic current density 到達極限時,增大electronic current density之后,capacity就會降低。我不是很能夠理解他的capacity是根據(jù)什么來算的? 原文如下: ”capacity decreases with the rate of charge or discharge, i.e. the magnitude of the electronic current in the external circuit, which must be matched by the internal ionic current within the battery. Since the ionic current density of the electrolyte and electrodes, including the rate of ion transfer across the electrode/electrolyte interface, is much smaller than the electronic current density, the electrodes and electrolyte have a large surface are and a small thickness. Nevertheless, at high current densities, the ionic motion within an electrode and/or across an electrode/electrolyte interface is too slow for the charge distribution to reach equilibrium, which is why the reversible capacity decreases with increasing current density in battey. -- Chem. Mater., Vol. 22, No. 3, 2010 (Challenges for rechargeable batteries) |
木蟲 (正式寫手)

木蟲 (正式寫手)

版主 (著名寫手)
木蟲 (著名寫手)

| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 085601 329分調(diào)劑 +3 | yzsa12 2026-03-31 | 3/150 |
|
|---|---|---|---|---|
|
[考研] 一志愿鄭大材料工程290求調(diào)劑 +12 | Youth_ 2026-03-30 | 12/600 |
|
|
[考研] 285求調(diào)劑 +5 | AZMK 2026-03-30 | 8/400 |
|
|
[考研] 生物考研337分求調(diào)劑 +3 | cgxin 2026-03-30 | 4/200 |
|
|
[考研] 生物學學碩,一志愿湖南大學,初試成績338 +7 | YYYYYNNNNN 2026-03-26 | 9/450 |
|
|
[考研] 085600 286分 材料求調(diào)劑 +11 | 麻辣魷魚 2026-03-27 | 12/600 |
|
|
[考研] 292求調(diào)劑 +13 | 是妍子也是研子 2026-03-30 | 13/650 |
|
|
[考研] 303求調(diào)劑 +7 | DLkz1314. 2026-03-30 | 7/350 |
|
|
[考研] 考研調(diào)劑 +5 | Sanmu-124 2026-03-26 | 5/250 |
|
|
[碩博家園] 求調(diào)劑 有機化學考研356分 +10 | Nadiums 2026-03-25 | 11/550 |
|
|
[考研] 材料與化工272求調(diào)劑 +21 | 阿斯蒂芬2004 2026-03-28 | 21/1050 |
|
|
[考研] 295求調(diào)劑 +5 | wei-5 2026-03-26 | 5/250 |
|
|
[考研] 調(diào)劑310 +12 | 溫柔的晚安 2026-03-25 | 13/650 |
|
|
[考研] 考研調(diào)劑 +7 | 小蠟新筆 2026-03-29 | 7/350 |
|
|
[考研] 0856調(diào)劑 +5 | 求求讓我有書讀?/a> 2026-03-26 | 6/300 |
|
|
[考研] 085601 材料工程 313分 求調(diào)劑 +5 | Ong3 2026-03-27 | 5/250 |
|
|
[考研] 314求調(diào)劑 +3 | 溪云珂 2026-03-26 | 3/150 |
|
|
[考研] 調(diào)劑 +3 | 李嘉圖·S·路 2026-03-27 | 3/150 |
|
|
[考研]
材料調(diào)劑
5+4
|
想要一壺桃花水 2026-03-25 | 10/500 |
|
|
[考研] 一志愿吉林大學材料與化工303分求調(diào)劑 +4 | 為學666 2026-03-24 | 4/200 |
|