Tim riset Li Mingtao saka Sekolah Teknik Kimia Universitas Xi’an Jiaotong wis nggawe terobosan ing aplikasi baterei lithium-sulfur kanthi ngrancang lan ngembangake bahan katoda kanthi lapisan protèktif graphene rong dimensi. Bahan katoda iki nduweni umur siklus sing dawa.

2d interkalasi G-C3N4 / graphene sandwich mbentuk jaring hiu multilayer antarane elektroda positif lan negatif saka baterei. Ora mung bisa mblokir gerakan polysulfides ing antarane elektroda positif lan negatif liwat panggunaan fisik lan kimia, nanging uga nyepetake panyebaran ion lithium, saéngga nambah umur siklus baterei.

Ing negaraku, pangembangan baterei lithium-sulfur relatif telat, lan isih ana ing tahap riset lan pangembangan laboratorium, kanthi sawetara aplikasi praktis. Efek pesawat ulang-alik sing disebabake dening pembubaran produk perantara lithium sulfida sajrone proses ngisi lan mbuwang baterei lithium sulfur dianggep minangka faktor kunci sing mbatesi aplikasi praktis.

Mantan wakil presiden Qinghai Dr. Li Technician Technology sapisan ngandika sing polysulfide dipun bibaraken anter jemput antariksa paling penting lan angel masalah baterei lithium-sulfur, lan karya dandan related isih ing tataran awal, nanging optimistis sing lithium-sulfur. baterei bisa digunakake minangka baterei secondary. Kanthi kapadhetan energi sing dhuwur, nduweni prospek pembangunan sing wiyar.

Dibandhingake karo NCM ternary mainstream saiki, energi spesifik teoretis baterei katoda belerang nganti 2600Wh / kg, sing luwih saka sepuluh kaping luwih saka baterei lithium sing saiki digunakake. Kajaba iku, cadangan belerang akeh banget lan murah, sing bisa nyuda rega kendaraan listrik sing nganggo baterei lithium.

Ing 2016, Komisi Pembangunan lan Reformasi Nasional ngusulake terobosan ing teknologi baterei lithium-sulfur kanthi kapadhetan energi 300Wh / kg ing “Revolusi Teknologi Energi lan Rencana Aksi Inovasi (2016-2030)”.

In contrast, according to the Action Measures to Promote the Development of the Automotive Power Industry and the Medium and Long-term Development Plan for the Automotive Industry released in 2017, the single-machine ratio can reach more than 300Wh/kg by 2020, and the single-machine ratio can reach 500Wh by 2025. /kg above. The theoretical energy density of lithium-sulfur batteries is greater than 500Wh/kg, so it is considered to be the development direction of the next generation of power lithium battery systems after lithium batteries.

Kanggo ngatasi masalah praktis ing aplikasi baterei lithium-sulfur, kalebu tim Qian Hanlin saka Universitas Ilmu lan Teknologi China, tim Wang Haihui saka South China University of Technology, ing Qingdao Energy lan Energy Storage Materials Advanced Tim Riset Teknologi Akademi Ilmu Pengetahuan Cina, tim Kimia Universitas Xiamen Nan Fengzheng lan tim riset Wang Universitas Jiaotong Shanghai wis nggawe kemajuan terobosan.

Ing Oktober 2018, Profesor Wang, Yitaiqian lan macem-macem Universitas Ilmu lan Teknologi China (Universitas Sains lan Teknologi) nemokake yen kinerja dinamis saka posisi pusat p-band elektron valensi relatif marang tingkat Fermi minangka faktor penting ing li -S baterei Interface reaksi transfer elektron. Para panaliti nemokake yen bahan mawa belerang adhedhasar kobalt kanthi polarisasi positif paling cilik lan kinerja tingkat paling apik nduweni kapasitas 417.3 Mahg-1 sanajan ing 40.0 ° C, sing cocog karo kapadhetan daya paling dhuwur saiki yaiku 137.3 kwkg-1. Asil riset diterbitake ing “Joule”, jurnal internasional bahan energi banget.

Baterei litium-sulfur minangka sistem baterei positif baterei lithium logam kanthi elektroda positif belerang. Kanggo ngatasi masalah safety saka dendrites Li diprodhuksi ing elektroda positif logam ing Shanghai Jiaotong University, tim Wang kang nyiapake jinis anyar saka solusi elektrolit baterei lithium (nggunakake pindho Lithium fluorosulfonimide dipun bibaraken ing triethyl fosfat lan fluoroether titik flash dhuwur kanggo njupuk elektrolit jenuh). . Dibandhingake karo elektrolit konsentrasi dhuwur, elektrolit anyar wis kurang biaya lan kurang viskositas, nambah pangayoman saka logam Li elektroda, èfèktif bisa mbusak dendrites elektroda Li, lan ngilangake beboyo safety potensial. Ing wektu sing padha, safety lan kinerja elektrokimia luwih apik ing kahanan suhu dhuwur ing ndhuwur 60 ° C.

In addition to scientific research, battery companies also use lithium-sulfur batteries as one of their technical reserves, actively demanding technological breakthroughs. Among these listed companies, China Nuclear Titanium Dioxide, Tibet Urban Investment, Jinlu Group, Guoxun High-tech, Dream Vision Technology and other companies have deployed lithium-sulfur battery projects.

Senajan baterei lithium-sulfur duwe sawetara masalah ing proses kanggo entuk Kapadhetan energi becik, ana syarat sing luwih dhuwur kanggo thinness sawetara aplikasi baterei, kayata unmanned aerial vehicles (UAV), kapal selam, lan prajurit nggawa tas. Kanggo sumber daya kanggo tujuan liyane, amarga bobot luwih penting tinimbang rega utawa urip, baterei lithium-sulfur wis wiwit digunakake kanthi praktis. Baterei lithium-sulfur anyar sing dikembangake dening perusahaan wiwitan Inggris Oxis Energy bisa nyimpen meh kaping pindho energi saben kilogram baterei lithium sing saiki digunakake ing kendaraan listrik. Nanging, ora bisa tahan suwe lan bakal gagal sawise udakara 100 siklus pangisi daya. Tujuan pabrik pilot cilik Oxis yaiku ngasilake 10,000 nganti 20,000 baterei saben taun. Jarene batre dilebokke tas tipis ukurane sak hp. Napa kita kudu ningkataké regenerasi lan daur ulang baterei lithium daya sanalika bisa? Sanajan sumber daya lithium negara saya rangking kaping papat ing saindenging jagad, amarga bijih lithium sing ora apik, kesulitan pemurnian, lan biaya sing dhuwur, jumlah bijih lithium sing akeh diimpor saben taun, lan tingkat katergantungan manca ngluwihi 85% . Kajaba iku, panjaluk China uga nyebabake rega lithium karbonat kelas baterei mundhak. Ing taun-taun pungkasan, rega wis mundhak meh kaping telu, sing nambah biaya pengadaan produsen baterei lithium China. Ing tangan siji, penghapusan baterei lithium daya minangka “tambang kutha” sing larang regane. Isi logam luwih dhuwur tinimbang bijih, lithium, kobalt, nikel lan logam mulia liyane. Daur ulang lan daur ulang bisa nambah efisiensi panggunaan sumber daya, nyuda impor, lan nyuda eksternal Gumantung lan nglindhungi keamanan strategi sumber daya nasional. Zhang Tianren ujar manawa, ing sisih liya, saka sudut pandang nyegah polusi lan nglindhungi lingkungan, yen baterei lithium sing dibuwang ora dibuwang kanthi bener, uga bakal nyebabake kerusakan lingkungan.

In order to better promote the recovery and reuse of lithium batteries for new energy vehicles, protect the ecological environment, and ensure the safety of national strategic resources, there are three important issues: the imperfect recycling system, the immature regeneration technology, and the weak incentive mechanism. Several aspects have put forward suggestions to promote the healthy and sustainable development of my country’s new energy automobile industry.

Speeding up the development of standards and unifying management standards are the basis for carrying out related work. He suggested that relevant departments speed up the formulation of management standards, technical standards and evaluation standards for the recycling and reuse of used batteries. Encourage regions with industrial advantages to formulate new energy lithium battery supervision, recovery, and recycling plans and implementation measures, and through preliminary pilots, explore national implementation measures that are more in line with industry realities and are more operable.