英文文獻(xiàn)匯報(bào)

硬膜板上催化作用下的自限性組裝：用在鋰硫電池中的中尺度石墨烯納米殼匯報(bào)人：XXX目錄你怎么稱呼老師？如果老師最后沒有總結(jié)一節(jié)課的重點(diǎn)的難點(diǎn)，你是否會(huì)認(rèn)為老師的教學(xué)方法需要改進(jìn)？你所經(jīng)歷的課堂，是講座式還是討論式？教師的教鞭“不怕太陽曬，也不怕那風(fēng)雨狂，只怕先生罵我笨，沒有學(xué)問無顏見爹娘……”“太陽當(dāng)空照，花兒對(duì)我笑，小鳥說早早早……”Source

of

the

articleResearch

background

ALi-S

batteriy:high

theoretical

energy

density

of

2600

Wh/kg;S:naturally

abundant,

economically

effective,

and

environmentallyfriendly;Graphene

and

other

nanostructured

carbon

materials: excellent

conductivity,

high

specific

surface

area,

accommodatelarge

volume

expansion;Issues:Li-S

battery:

poor

cycling

life

and

rate

performanceS:

large

volumetric

expansion，poor

conductivityGraphene:

couldn’t

integrate

all

the

structural

benefits.The

concept

of

HGNs

might

be

a

promising

strategy,

which

yetcalls

for

new

synthetic

methodology.Research

background

B?研究背景：中空納米結(jié)構(gòu)對(duì)提升電池性能有巨大優(yōu)勢(shì)，但傳統(tǒng)方法難以制作?研究目的：提升鋰硫電池容量；提高電池穩(wěn)定性?解決方案：中空石墨烯納米球殼結(jié)構(gòu)，嵌入硫合成復(fù)合材料，作為電池正極AbstractHollow

nanostructures：表面積大；活性部位充分暴露；物質(zhì)輸運(yùn)的動(dòng)力學(xué)性能優(yōu)良；表面通透性好A

mesoscale

approach

to

fabricate

graphene

shells: 催化劑作用下，在原位形成的納米顆粒上實(shí)現(xiàn)納米石墨烯的自限性組裝Use:石墨烯納米球殼作為基體與S復(fù)合，用作鋰硫電池正極材料Properties:初始放電容量：1520mAh/g(0.1C)電流密度從0.1C提升至2.0C，70%容量保持1000次循環(huán)，每次衰減0.06%IntroductionHollow

nanostructures的優(yōu)勢(shì)Applications：catalysis,

adsorption,

chemical

sensors,

drug/gene

deliveryand

energy

storage/conversion

systemsHollow

nanocrystals：mesoscale

hollow

structure,

nanoscale

quantum

effects,

andatomic-scale

periodic

arrangementHollow

graphene

nanoshells(HGNs)：favourable

electrical

conductivity,

good

surface

functionalmechanical/chemical

stability,

and

biocompatibilityHollow

nanostructures的合成困境

The

template-free

or

self-templatingbottom-up

approaches：hardly

extended

toHGN

synthesis；

A

template-involving

top-down

strategy：nocatalytic

capability

to

regularly

manage

thearrangement

of

carbon

atoms；

Thus,

controllable

synthesis

of

HGNs

withan

engineered

hollow

cavity,

predeterminedlayer

number,

small

size,

and

highlycrystalline

few-layer

graphene

shells

israrely

achievedHollow

nanostructures新的合成方案

A

mesoscale

catalytic

self-limitedassembly

of

hollow

graphene

spheres

wasproposed.

Hard

templates

and

working

catalysts:

insitu

formed

nickel-based

NPsCarbon

source:

dodecyl

sulfate(DS)

3D

mesostructure:

zero-dimensional

(0D)HGNs

construct

two-dimensional

(2D)nanosheets

and

then

assemble

into

athree-dimensional

(3D)

mesostructureResults

and

DiscussionThe

in

situ

catalytic

self-limitedassembly

of

HGNsMorphology

and

structure

of

α-Ni(OH)2-DSMorphology

and

structure

of

HGNsMorphology

and

structure

of

HGNsElectrochemical

performance

of

HGN-Morphology

of

cycled

HGN-SelectrodesConclusions

HGNs通過介尺度催化自限性組裝法合成，具有非常小的粒徑、單層或多層的石墨烯片層、3D分層的花瓣?duì)钕嘈螒B(tài)；

原位形成的Ni基納米顆粒既作為硬膜板，又充當(dāng)催化劑，催化3D納米結(jié)構(gòu)的石墨烯在硬膜板上沉積；

HGNs的粒徑為10-30nm，SSA高達(dá)979平米每克，孔體積1.98立方米每克，被用在高倍率Li-S電池中作為基體來容納S；

HGN-S正極材料有高的放電容量（1